Where to Find High-Quality Handbag Hardware Suppliers in 2026

Finding high-quality handbag hardware suppliers is not simply a matter of comparing catalogue prices. Buckles, locks, D-rings, zipper pulls, chains, rivets, and logo plates influence a bag’s visual grade, load-bearing performance, compliance risk, and delivery schedule. A supplier that looks competitive at sample stage may still fail when plating varies between batches, a mold is not controlled, or a component cannot pass assembly testing.

This procurement guide expands the usual regional supplier list into a practical sourcing system. It compares China and India, explains why Dongguan is especially useful for custom programs, shows how to audit a handbag hardware factory, and provides a staged checklist covering design, material, tooling, plating, inspection, packaging, and after-sales support.

Quick Answer: Where can buyers find high-quality handbag hardware suppliers?

High-quality handbag hardware suppliers are concentrated in China’s Pearl River Delta, especially Dongguan, Guangzhou, and Foshan, with additional export-oriented clusters in Zhejiang and Wenzhou; India is useful for selected leather-goods and small-batch sourcing. For custom OEM projects, Dongguan is often the most efficient starting point because mold making, die casting, polishing, electroplating, CNC machining, assembly, and export logistics are located within a connected industrial network. Buyers should qualify factories through samples, process records, plating tests, and a controlled pilot order rather than catalogue photos alone.

Key Takeaways for Hardware Procurement

• Choose the production cluster according to design complexity, material, order size, finish, and required delivery window.
• Dongguan is a strong choice for custom handbag hardware because tooling, zinc-alloy die casting, finishing, and OEM coordination can be managed in one manufacturing ecosystem.
• Specify the base material and finish separately. Zamak, brass, and stainless steel produce different weight, detail, corrosion, and cost results.
• Ask for a golden sample, approved color standard, dimensional drawing, inspection plan, and batch traceability before mass production.
• Use salt spray testing as comparative evidence, not as the only prediction of field performance. The current ASTM B117 page explains this limitation.
• For Europe-bound products, request material declarations and evidence relevant to REACH and RoHS before purchase orders are released.

Table of Contents

• 1. Where are the main sourcing regions?
• 2. Pearl River Delta: Dongguan, Guangzhou, and Foshan
  • Dongguan: Custom OEM and Precision Handbag Hardware
  • Guangzhou: Leather-Goods Market Access
  • Foshan: Metal Processing and Surface Treatment
  • Recommended Pearl River Delta Sourcing Route
• 3. When should buyers choose Dongguan?
• 4. How should buyers select a supplier?
• 5. Which materials and finishes should buyers compare?
• 6. What should a factory audit include?
• 7. China versus India: which source fits your project?
• 8. Common sourcing mistakes
• 9. Frequently asked questions

Where Are the Main Sourcing Regions for Handbag Hardware?

The main sourcing regions are the Pearl River Delta in China, the Yangtze River Delta in China, and several Indian leather-goods clusters. The best region depends on whether the buyer prioritizes precision customization, fast sampling, export-standard repeatability, low-volume flexibility, or local market access.

Pearl River Delta: Dongguan, Guangzhou, and Foshan

The Pearl River Delta is one of China’s most important sourcing regions for handbag hardware because Dongguan, Guangzhou, and Foshan provide different but complementary manufacturing capabilities. Dongguan is particularly suitable for custom OEM and ODM projects, Guangzhou is valuable for leather-goods market access and product variety, while Foshan is strong in metal processing, polishing, surface treatment, and supporting manufacturing services. Buyers should not treat the three cities as interchangeable; the most efficient sourcing route depends on the hardware design, material, finish, order quantity, and required level of customization.

Dongguan: Custom OEM and Precision Handbag Hardware

Dongguan is one of the strongest choices for buyers looking for a custom handbag hardware supplier because the city has a mature network covering mold development, zinc-alloy die casting, stamping, CNC machining, polishing, electroplating, assembly, and export packaging. This integrated manufacturing environment allows a custom component to move from a design drawing to a functional sample without relying entirely on distant subcontractors.

Dongguan is especially suitable for handbag locks, custom buckles, D-rings, strap connectors, logo plates, zipper pulls, snap hooks, decorative chains, and other components that require customized geometry or branding. The region also supports different base materials, including Zamak zinc alloy, brass, stainless steel, and selected aluminum or iron applications. Zamak is frequently selected for detailed die-cast shapes, while brass is often preferred when the buyer wants a denser premium feel or a traditional stamped and machined appearance.

When visiting a Dongguan handbag hardware factory, buyers should focus on the complete production route rather than only the showroom. The audit should cover the following stages:

1. Mold development: Verify whether the factory designs and manages molds internally, how mold revisions are recorded, and who owns the tooling after development.
2. Die casting or stamping: Check alloy control, casting conditions, parting lines, hidden porosity, trimming quality, and dimensional repeatability.
3. Machining and polishing: Inspect CNC equipment, deburring, edge safety, surface smoothness, and the handling of visible logo areas.
4. Surface treatment: Confirm the plating sequence, color standard, layer control, and whether the component uses rack plating, barrel plating, or PVD coating.
5. Inspection and packing: Review first-piece approval, in-process checks, final inspection, carton traceability, and protection against scratches during shipment.

For brands that need one partner to coordinate several related components, Dongguan offers an additional advantage. A handbag collection may require a logo plate, clasp, buckle, strap ring, zipper pull, and chain in the same gold, silver, gunmetal, or antique finish. When these parts are developed through a connected production network, the supplier has a better opportunity to control color matching, polishing standards, plating appearance, and packaging consistency.

DG Buddy is one example of a Dongguan-based handbag hardware manufacturer offering OEM and ODM support for custom buckles, locks, rings, zipper pulls, chains, and logo hardware. Buyers considering DG Buddy or any other Dongguan factory should request the same evidence: technical drawings, material specifications, sample approval records, plating details, test reports, production lead times, and quality-control procedures. A supplier example should support the sourcing decision, not replace independent qualification.

Dongguan is generally the most suitable choice when the project includes custom tooling, multiple coordinated components, premium finishes, recurring export orders, or a need to move quickly from prototype to mass production. However, location alone is not proof of quality. A factory audit should still confirm whether key processes are performed in-house or subcontracted and which company is accountable for the final product.

Guangzhou: Leather-Goods Market Access and Fast Product Matching

Guangzhou is a practical sourcing location for buyers who need a broad range of handbag components, quick market comparison, and close access to leather-goods manufacturers. Shiling Town in Huadu District is widely associated with leather bags, luggage, leather accessories, and related hardware. This makes Guangzhou useful for buyers who are developing a complete handbag collection rather than sourcing only one isolated metal component.

The main advantage of Guangzhou is the connection between hardware suppliers, bag factories, leather suppliers, sample rooms, packaging companies, and trading businesses. A buyer can often compare several types of buckles, locks, rings, chains, rivets, zipper pulls, and decorative parts within a relatively short sourcing schedule. This is helpful during the early product-development stage when the final design has not yet been fixed.

Guangzhou is particularly suitable for standard or semi-custom hardware, seasonal collections, small and medium-sized brands, quick sample comparisons, and replacement or supplementary components. Its leather-goods ecosystem can shorten communication between the hardware supplier and the bag manufacturer. For example, a buckle may appear suitable as a loose metal component but be too heavy for a soft leather strap, while a lock may require a different reinforcement layer inside the bag.

Guangzhou also requires careful supplier screening. Some businesses operate primarily as trading companies or sample distributors and may not own casting, stamping, polishing, or plating equipment. Before placing an order, ask whether the supplier owns the mold, where the hardware is manufactured, which processes are subcontracted, and who performs final inspection. A useful route begins with sample comparison and ends with source-factory verification, ensuring that the bulk-order specification matches the showroom sample.

Foshan: Metal Processing, Surface Treatment, and Supporting Production

Foshan is an important supporting manufacturing area in the Pearl River Delta, particularly for metal processing, polishing, surface treatment, stamping, machining, and related industrial services. It can be valuable when a handbag hardware project requires a specialized finish, reinforcement component, stamped part, or secondary process that needs to be coordinated with a nearby source factory.

Foshan is suitable for stamped brass or stainless-steel components, precision-machined rings and connectors, visible-surface polishing, electroplating and finish development, metal reinforcement parts, and supporting processes for a main OEM factory located in Dongguan or Guangzhou.

Surface treatment is one of Foshan’s useful contributions to the regional supply chain. The appearance of handbag hardware depends not only on the base metal but also on cleaning, polishing, activation, plating layers, drying, handling, and final inspection. Two parts made from the same Zamak or brass alloy can show different color, brightness, and texture when pretreatment or polishing standards change.

For this reason, buyers should not specify a finish only as “gold,” “silver,” “black,” or “antique brass.” The technical file should include a physical color standard, surface gloss expectation, acceptable variation, plating method, protective coating if applicable, and inspection requirements. If the hardware will be exposed to sweat, moisture, friction, or outdoor use, the buyer should also define the appropriate corrosion and abrasion evaluation.

Foshan can complement a Dongguan or Guangzhou production partner when an existing design needs smoother polishing, a more controlled antique effect, a different plating color, or better resistance to handling scratches. However, outsourced surface treatment creates a traceability risk if responsibilities are unclear. The buyer should establish which company controls the approved color sample, who authorizes plating changes, how rejected parts are separated, and who pays for rework.

Recommended Pearl River Delta Sourcing Route

For international buyers, an efficient Pearl River Delta sourcing route is to begin in Guangzhou for market comparison, continue to Dongguan for factory and tooling verification, and use Foshan when the project requires additional metal processing or surface-treatment evaluation. Guangzhou is often strongest for discovery and product comparison, Dongguan for custom engineering and OEM production, and Foshan for specialized processing and finishing.

1. Start in Guangzhou: Review product styles, compare standard components, and understand leather-goods market preferences.
2. Continue to Dongguan: Inspect the source factory, verify molds and production equipment, review OEM capability, and approve custom samples.
3. Evaluate Foshan when needed: Investigate polishing, electroplating, stamping, machining, or reinforcement processes for demanding surface or structural requirements.
4. Return to the accountable supplier: Confirm the final process route, inspection responsibility, approved sample, packaging, lead time, and corrective-action procedure in writing.

The key principle is to treat Dongguan, Guangzhou, and Foshan as a connected manufacturing ecosystem rather than three isolated supplier markets. A buyer who maps these capabilities against the actual product specification can reduce unnecessary supplier changes, improve finish consistency, and make the final procurement decision with more reliable evidence.

Yangtze River Delta: Standardized and Export-Oriented Supply

Pinghu and nearby Zhejiang areas are relevant for fasteners and export-oriented accessories, while Wenzhou is widely associated with zipper-related components and stamped metal parts. These areas may suit standardized items, established specifications, and larger repeat orders. However, the buyer should confirm the actual factory location and production scope because trading offices and manufacturing plants are often presented under similar regional names.

India: Leather-Goods Clusters and Small-Batch Options

India can be useful when procurement is connected to local leather production, traditional metalwork, or smaller regional programs. Kolkata and nearby leather clusters can support leather-goods exporters, Kanpur is associated with leather manufacturing and functional components, and Mumbai is a practical commercial base for sampling and supplier introductions. The limitation is that tooling, die casting, plating, and final assembly may be distributed across different subcontractors, so the audit must map the complete chain.

Knowledge Box: What is a production cluster?

What: A production cluster is a geographic network of factories and supporting businesses that specialize in related processes. Why: Clusters shorten transport between mold making, casting, polishing, plating, and assembly, which can reduce communication delays and make sampling faster. How: Buyers should still audit the specific supplier. A convenient location does not prove that one factory owns the equipment or controls the subcontracted processes.

When Should Buyers Choose Dongguan?

Dongguan is a strong location for custom handbag hardware because a design can move through tooling, die casting, trimming, polishing, plating, laser marking, assembly, and inspection without leaving a mature manufacturing network. This matters when a brand needs several related parts—such as a logo plate, lock, buckle, D-ring, and zipper pull—to share one finish and visual language.

When evaluating a Dongguan handbag hardware manufacturer, buyers should separate verified capability from marketing language. Ask to see the mold-development process, current production equipment, plating route, in-process inspection records, and finished-goods area. The factory should be able to explain how it handles die wear, porosity, burrs, color drift, thread damage, and packing scratches.

Knowledge Box: Why does mold ownership matter?

What: A production mold defines the geometry, logo detail, parting line, and repeatability of a custom component. Why: If ownership and maintenance are unclear, a buyer may face delays when a second supplier is needed or when a worn mold changes dimensions. How: Put the mold number, revision, ownership, storage location, repair approval, and permitted use into the purchase agreement. Request a first-article approval before the mold is released for volume production.

How Should Buyers Select a Handbag Hardware Supplier?

Buyers should select a supplier through a seven-step qualification process: define the component brief, shortlist factories, verify production scope, approve samples, test materials and finishes, run a pilot order, and monitor repeat batches. This approach is more reliable than choosing the lowest quotation or the supplier with the largest online catalogue.

Step 1: Write a complete technical brief

Include the component name, drawing, dimensions, tolerance, base material, logo method, finish, color reference, functional load, assembly method, packaging, target annual volume, and destination market. If the part is structural, state the required load or cycle test. If it is decorative, state the acceptable surface defects and color tolerance.

Step 2: Verify factory scope and production control

A credible handbag hardware factory can explain which operations are performed in-house and which are subcontracted. In-house production is not automatically better, but the responsibility for quality must be clear. Check business registration, equipment photographs taken during the visit, process flow, production capacity by shift, quality staff, and records for rejected parts.

Step 3: Compare samples, not just prices

Request at least two samples from the same drawing when possible. Compare weight, dimensions, edge safety, logo sharpness, spring action, plating color, adhesion, and assembly fit. A sample approval sheet should include photographs and measurable acceptance criteria. For a multi-part program, test components together because a buckle and strap anchor can look correct individually but fail during assembly.

Step 4: Confirm MOQ, tooling, and lead time

MOQ should be discussed by part number and finish, not only by total order value. Ask whether different colors can share a production run, whether a new mold is needed, and what happens when an order falls below the normal batch size. Custom samples may take from several days to several weeks depending on complexity; a supplier should provide a stage-by-stage schedule rather than one vague delivery date.

Step 5: Audit plating and compliance

Ask for the layer structure and process name, such as electroplating or PVD coating, instead of accepting “gold color” as a specification. Confirm whether the finish uses rack plating or barrel plating. Rack plating usually gives better orientation and control for visible, delicate, or larger parts; barrel plating can be economical for many small components but may create contact marks or variation if the process is not controlled.

For European programs, ask for current declarations and test reports relevant to EU REACH requirements and applicable RoHS expectations. If a supplier provides an SGS report, verify the report number, tested sample, date, and test scope. A certificate with no traceable sample or product description is weak evidence.

Step 6: Run a pilot order with a control sample

The pilot order should be large enough to expose variation but small enough to limit risk. Keep the approved golden sample with the purchase file and check production against it before packing. Record first-piece inspection, in-process inspection, final inspection, quantity, carton identification, and nonconformance decisions.

Step 7: Measure the supplier after delivery

Score on-time delivery, defect rate, plating consistency, response time, corrective action, packaging performance, and document accuracy. A supplier that fixes a problem with a documented root-cause action is more valuable than one that only promises a discount after a defect appears.

Which Materials and Finishes Should Buyers Compare?

The best material depends on the part’s function, appearance, weight target, detail level, corrosion environment, and budget. Zamak zinc alloy is common for die-cast buckles, locks, rings, logo plates, and zipper pulls because it fills fine details and supports efficient complex shapes. Brass offers a denser premium feel and good machining or stamping behavior. Stainless steel is useful where corrosion resistance and structural durability have priority, although it may require different tooling and finishing methods.

Material or finish	Main advantages	Procurement cautions	Typical use
Zamak zinc alloy	Fine detail, efficient die casting, broad shape flexibility	Check porosity, wall thickness, brittleness, and plating preparation	Locks, buckles, D-rings, logo plates, zipper pulls
Brass	Dense hand feel, premium perception, good machining and stamping	Higher material cost and possible color differences under the same plating	Luxury buckles, clasps, decorative plates
Stainless steel	Strong corrosion resistance and structural performance	More demanding machining, forming, and polishing requirements	Load-bearing rings, hooks, outdoor or travel products
Electroplating	Wide color range and scalable production	Layer thickness, adhesion, chemical control, and color drift require monitoring	Gold, nickel, gunmetal, antique, and bright finishes
PVD coating	Hard decorative surface and premium finish options	Higher process cost; substrate preparation and color matching remain critical	High-wear premium hardware and distinctive colors

Knowledge Box: What does a salt spray test prove?

What: A salt spray test exposes coated metal to a controlled corrosive fog. Why: It helps compare finish systems and detect early corrosion under defined conditions. How: Use a documented method, exposure time, specimen description, and failure criteria. ASTM B117 states that salt spray results should not be treated as a stand-alone prediction of natural outdoor performance. Therefore, combine the result with adhesion, abrasion, humidity, and real-use evaluation.

What Should a Factory Audit Include?

A useful audit follows the product from drawing to packed carton. The auditor should verify the factory’s identity, equipment, process controls, operators, records, testing, and corrective-action system. A short video call can confirm basic information, but an on-site visit or trusted third-party inspection is preferable for a high-value custom program.

1. Company and capacity: Confirm legal identity, address, workforce, shifts, major equipment, export experience, and current workload.
2. Tooling: Check mold design, mold numbering, maintenance, spare inserts, revision control, and ownership terms.
3. Material: Verify alloy or metal specification, incoming inspection, supplier traceability, and separation of approved and rejected material.
4. Casting and machining: Look for control of temperature, pressure, trimming, CNC dimensions, burr removal, and hidden porosity.
5. Polishing and plating: Review cleaning, activation, layer sequence, color standards, rack or barrel loading, wastewater control, and rework records.
6. Inspection: Confirm gauges, weighing scales, color references, functional fixtures, sampling level, final inspection, and carton traceability.
7. Social and environmental documentation: Request relevant ISO 9001, REACH, RoHS, or third-party reports only when they match the factory and product scope.

China Versus India: Which Source Fits Your Project?

China is usually the more efficient first choice for complex custom hardware, integrated color matching, and repeated export production because the industrial network supports tooling and multiple finishing routes. India may be attractive when the buyer is already operating a leather-goods supply chain there, wants regional development, or needs a smaller local program. Neither country should be judged only by geography; the decisive factor is process control for the exact component.

Decision factor	China, especially Dongguan	India clusters	Buyer implication
Custom geometry	Strong mold and die-casting ecosystem	Available but may involve more distributed subcontracting	Map tooling ownership and process responsibility
Finish coordination	Many plating and polishing options within the regional network	Depends strongly on the selected cluster and partners	Approve color standards and test samples
Small-batch development	Good when supplier supports rapid sampling	Can be practical for local leather-goods programs	Confirm MOQ by color and part number
Export documentation	Often mature for global bag and luggage supply chains	Varies by factory and trading partner	Audit documents, not claims
Integrated production	Strong cluster advantage	May require multiple vendor coordination	Assign one accountable quality owner

Pros and Cons of Buying from a Regional Hardware Cluster

Pros

• Shorter communication and transport links between mold, casting, polishing, plating, and assembly.
• More opportunities to compare samples, materials, colors, and suppliers during one sourcing trip.
• Better access to specialized equipment and process technicians.
• More flexibility for OEM and ODM development than buying only standard catalogue parts.

Cons

• Many supplier choices can hide inconsistent quality and make due diligence time-consuming.
• Subcontracting can create color, dimensional, or traceability gaps.
• Low quotations may exclude mold maintenance, testing, packaging, rework, or export costs.
• A cluster location does not guarantee that a factory has stable capacity for your peak season.

Common Mistakes When Choosing High-Quality Handbag Hardware Suppliers

The most common mistakes are avoidable because they occur before mass production. Buyers often approve a beautiful sample without checking the base alloy, plating stack, functional test, or packaging. Another frequent error is asking for “the same gold” across several suppliers without a physical color standard and measurement method.

• Choosing by catalogue: Catalogue images do not reveal hidden porosity, plating adhesion, or supplier ownership.
• Comparing unit price only: A lower quote may exclude mold fees, testing, packaging, or a higher defect rate.
• Ignoring the assembly environment: A part that passes visual inspection may scratch leather, cut thread, or loosen under load.
• Using vague finish names: “Antique gold” and “matte black” need a physical reference, process description, and acceptable range.
• Skipping a pilot order: First samples are often made by the most experienced operator; repeat batches reveal the real process.
• Accepting unsupported certificates: The report must identify the company, product, test date, sample, and applicable standard.

Factory-Level Tips for Supplier Qualification

From our OEM production experience, the fastest way to prevent a late-stage hardware problem is to freeze the technical file before the mold is cut. A useful file contains the 2D drawing, 3D reference, material, finish stack, logo artwork, target weight, tolerance, functional test, packaging, and approved sample photographs. This prevents a buyer and factory from using different interpretations of the same design.

For visible parts, we recommend sampling the final substrate and final finish together. A gold finish over brass can look warmer than the same nominal color over Zamak. For small parts, ask whether rack plating or barrel plating is appropriate; the answer depends on geometry, contact points, quantity, and the visual surface. For structural parts, test the assembled component rather than the loose metal alone.

A reliable quality-control sequence includes incoming material verification, first-article approval, in-process dimensional checks, surface inspection after polishing, plating adhesion or corrosion evaluation, functional testing, final sampling, and carton traceability. These recommendations reflect common OEM production practices used by experienced Dongguan handbag hardware manufacturers, including suppliers such as DG Buddy. Buyers should still verify every capability through samples, records, and factory inspection.

Expert Recommendation: When Should You Choose a Dongguan Supplier?

Choose a Dongguan supplier when your program involves custom molds, multiple coordinated components, premium surface finishes, recurring export orders, or a need to move quickly from sketch to production. Dongguan is also a sensible starting point when the buyer wants one accountable OEM partner instead of coordinating separate mold, casting, plating, and packing vendors.

Do not choose a supplier solely because it is located in Dongguan. If the project is a simple standard part with a very small quantity, a specialized distributor may be more economical. If the product has unusual compliance, load, or corrosion requirements, qualify the factory through independent testing and a controlled pilot order. The right decision is the factory that can demonstrate repeatability for your exact part, finish, and delivery requirement.

Conclusion: Build a Verified Supplier Shortlist

The best sourcing route combines regional knowledge with evidence-based qualification. China’s Pearl River Delta, especially Dongguan, offers a strong ecosystem for custom handbag hardware, while Guangzhou, Foshan, Zhejiang, Wenzhou, and selected Indian clusters can serve different product and sourcing needs. The final choice should be based on material suitability, mold control, plating consistency, compliance documents, inspection discipline, MOQ, lead time, and corrective-action capability.

For buyers beginning a new program, compare the supplier’s technical response before comparing the final price. A factory that asks about load, leather thickness, color standard, logo detail, packaging, and destination regulation is already reducing project risk. You can review this supplier selection guide and contact a qualified Dongguan manufacturer for drawing review, sample development, Product Catalog，or OEM consultation.

Frequently Asked Questions

Where can I find high-quality handbag hardware suppliers in China?

Start with Dongguan, Guangzhou, and Foshan in the Pearl River Delta for custom and integrated production. Zhejiang and Wenzhou can be useful for standardized fasteners and zipper-related components. Search results are only a shortlist; verify the actual factory, process ownership, samples, inspection records, and export documentation before placing an order.

What is the best city for custom handbag hardware?

Dongguan is often the best starting point for custom handbag hardware because mold making, zinc-alloy die casting, polishing, electroplating, CNC machining, and OEM coordination are available in one mature industrial region. The best individual supplier still depends on your part geometry, finish, volume, compliance requirements, and ability to pass a pilot order.

How do I choose a handbag hardware supplier in China?

Define the specification, verify the supplier’s factory scope, request production samples, confirm mold ownership, audit material and plating controls, check relevant REACH or RoHS evidence, run a pilot order, and score delivery and defect performance. A factory should explain its process and show traceable records instead of relying on general claims of quality.

How can I test handbag hardware plating quality?

Use visual inspection, dimensional checks, adhesion evaluation, abrasion or handling tests, and a documented salt spray test where corrosion comparison is relevant. Specify exposure time and failure criteria in advance. ASTM B117 provides a controlled salt-fog practice, but its results should be combined with other tests and real-use evaluation rather than treated as a complete lifetime prediction.

Can a supplier support small batch handbag hardware orders?

Some OEM factories support small-batch development or sample orders, but MOQ often changes by material, color, mold, and finishing route. Ask for the MOQ for each part number and finish, the sample cost, whether the tooling can be reused, and the lead time for repeat orders. A small pilot order is useful when its acceptance criteria are written clearly.

What should I ask before ordering custom handbag hardware?

Ask for the material specification, drawing review, mold cost and ownership, finish stack, color standard, functional test, corrosion or compliance documents, MOQ, production lead time, inspection plan, packaging method, defect handling, and after-sales contact. Also ask which processes are subcontracted and who remains responsible for final quality.

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