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Frequently Asked Questions

Minimum order, mixed containers, how we confirm bore and port thread, what gets tested and recorded, private label, lead times and export documents — the questions buyers actually ask before the first order.

In short

  • Five lines only: brake master, brake wheel, clutch master, clutch slave and cylinder repair kits
  • Mixed, low-quantity containers — no strict MOQ to open an account
  • Bore, port thread and mounting distance confirmed in writing before production
  • 100% pressure and leak tested, with the batch record held on file
  • Quotes answered within one working day
01 — FAQ

Ordering & minimums


What it takes to place a first order

Do you have a minimum order quantity?
Trial orders can start from a mixed, low-quantity container — we consolidate in our Wenzhou warehouse, so there is no strict MOQ to open an account. Once a part number moves into regular production the MOQ is typically 100–200 pcs per model, depending on the cylinder type and the packaging you choose. If you want to test six references at 50 pcs each first, that is a normal starting order for us.
Can I order a mixed container of several part numbers?
Yes — consolidation is what the Wenzhou warehouse does best. Dozens of part numbers travel in one container, sorted and labelled per destination, with one packing list and one B/L. Mixed loads are the usual way importers test a new range without committing cash to a single slow-moving reference.
Can I get samples before committing to volume?
Yes. Physical samples ship from Wenzhou so your workshop or your own counter can validate fit and pedal feel before you commit. We quote samples at unit price plus courier; the sample cost is credited against the first production order for the same part number.
How fast do you quote, and what should I include in the inquiry?
We answer within one working day, and usually the same day. To come back with a real quotation rather than a question, send any of: the OE number; an aftermarket reference such as TRW, LPR or A.B.S.; three photographs of the old unit with a steel rule across the bore; or simply the vehicle make, model and year plus the wheel position. Quantities, destination port and whether you want your own brand on the box all change the price, so include them if you have them.
How long does production and shipping take?
Stocked models ship in 7–15 days. A new part number runs 25–45 days after drawing approval and deposit, plus sea transit. We quote FOB Ningbo / Shanghai as standard, and can arrange door-to-door logistics including export customs, booking, insurance and documents such as the B/L and C/O.
02 — FAQ

Confirming the right part


The step that decides whether the job comes back

How do I confirm the correct part number?
You do not have to know it. Send what you have — an OE number, a cross-reference, or photographs of the old unit — and we search the OE cross-reference, then write back with the bore diameter, port thread and pitch, mounting bore distance and body material. Those four figures are what decide fit, and you approve them in writing before we start production.
How do you stop the wrong bore being shipped?
We never confirm a cylinder from a vehicle name alone. The bore, the port thread, the mounting bore distance and the body material are stated on every quotation and checked against a drawing before the order is released. A cylinder that accepts the pipe but not the axle is the most common hydraulic ordering mistake, and it is avoidable at the quotation stage rather than at the claim stage.
Do you guarantee the same bore on repeat orders?
Yes. The drawing is locked against the approved sample, and every subsequent batch is measured against that same document — not against the last batch. The batch record states the measured bore so you have the evidence on file if a workshop ever questions it.
What is an OE number?
The original equipment number — the reference the vehicle manufacturer uses for that part. It is the most reliable way to identify a cylinder, because it is unambiguous: one number, one specification. It is stamped, cast or printed on most factory-fitted units, and appears on the parts diagram for your model.
What is a cross-reference?
A cross-reference maps one OE number to the equivalent part numbers used by aftermarket brands — TRW, LPR, Metelli, A.B.S. and others. It lets a workshop find the right cylinder from whichever number they happen to have on the shelf or in their system. We hold the cross-reference for the ranges we supply and will send it with the quotation.
What is bore diameter, and why does it matter so much?
The internal diameter of the cylinder — the figure that, together with pedal travel, sets how much fluid the cylinder displaces. On a brake master cylinder it decides pedal effort and travel; on a clutch cylinder a fraction of a millimetre changes where the clutch bites. Two cylinders that look identical from the outside can differ by 0.8 mm of bore and behave completely differently, which is why we ask for it to be confirmed rather than assumed.
03 — FAQ

Quality, testing & warranty


What is measured, recorded and guaranteed

Are your cylinders tested before shipment?
Every unit is pressure and leak tested at the end of the line, and we hold the test record per batch. On top of that, our three-stage inspection runs a pre-production audit, during-production (DUPRO) monitoring and an AQL pre-shipment check, with the report and high-resolution photographs sent to you for approval before the container is loaded.
Can I get the inspection report before the container ships?
Yes, and we would rather you asked. You receive the inspection report, the batch pressure-test record and the photographs while the goods are still in the warehouse, so any issue is resolved before they sail rather than after they land. Third-party inspection by SGS, BV or TÜV can be arranged at your cost if your compliance process requires an independent report.
What is DUPRO?
During-production inspection — a check carried out while the batch is still running, not only at the end. It catches a drifting dimension or a changed seal compound early enough to correct the batch instead of scrapping it. It is the middle stage of our three-stage process, between the pre-production audit and the AQL pre-shipment check.
What is the warranty on a cylinder?
12 months or 30,000 km on hydraulic parts, stated on the quotation, against manufacturing defects in materials and workmanship. The batch pressure-test record we hold is what supports a claim, so a warranty conversation starts with the batch number rather than an argument.
Who is responsible if the goods are wrong?
We are. If a unit does not match the bore, port thread or mounting distance we confirmed in writing on the quotation, that is our error and we replace it — you are not left holding a container of parts you cannot sell. This is exactly why we put those figures in writing before production: it turns a dispute into a comparison against a document.
04 — FAQ

Private label


Building your own brand on the range

Can you supply cylinders under our own brand?
Yes — private label (OEM/ODM) is our core service, not a side offer. We develop the brand identifier, box, part number label, bag and master carton artwork with unlimited revisions until it matches your vision, then keep a print-ready master file so that the fifth order looks exactly like the first.
What do you need from us to start?
A single logo file is enough to begin. From there our design team develops the box, the part number label carrying your OE reference and bore, the bag and the master carton, and sends proofs for approval before anything is printed. Territory and part-number protection can be agreed at the same stage if you are building a range rather than buying a one-off order.
05 — FAQ

Products, scope & shipping


What we supply, and what we do not

Which cylinder types do you supply?
Five lines: brake master cylinders, brake wheel cylinders, clutch master cylinders, clutch slave cylinders (including the concentric type) and cylinder repair kits. That is the complete range — we do not supply brake proportioning or load-sensing valves, and we are not a brake friction material supplier.
Do you supply motorcycle or powersports cylinders?
No. Our scope is road and off-highway vehicles — passenger cars, SUVs and pickups, light commercial vehicles, trucks and buses, plus off-highway applications such as forklifts, agricultural and construction machinery. ATV and UTV are in scope as vehicles; motorcycle and powersports parts are not, and we would rather say so than quote for something we do not specialise in.
What is a concentric slave cylinder?
A clutch slave cylinder built around the release bearing and mounted on the gearbox input shaft, instead of sitting outside the gearbox and pushing a release fork. It removes the fork and the external linkage entirely, which makes the release more precise but less forgiving to fit: it has to be bled on the bench or with a pressure bleeder, not by pumping the pedal.
Do you supply cylinders for trucks, forklifts and farm machinery?
Yes — the same five lines cover those applications. Truck, bus and trailer use wheel cylinders and master cylinders sized for load, and off-highway machinery uses the same families in smaller volumes per reference. Batch consistency matters more than brand in these applications: a fleet lives or dies on the part behaving the same way every time.
Can you handle the export documents and shipping?
Yes. Export customs, booking, insurance and the document set (B/L, C/O, packing list, commercial invoice) are handled on our side under one consistent format, whether you buy FOB, CIF or door-to-door. If your market needs a specific certificate for the part numbers you are buying, tell us at the quotation stage and we will confirm which documents apply.
Which markets do you ship to?
Europe, Latin America, the Middle East, Africa, Southeast Asia and beyond — 40+ markets since 2015. Destination matters for more than freight: it decides which packaging marks, which language on the box and which product documentation are appropriate, and we would rather build that in from the first quotation.
What does DOT 3 / DOT 4 mean?
They are the two brake and clutch fluid specifications our seals and fluid paths are built for. The difference is the dry and wet boiling point, which matters more on vehicles that work hard — towing, mountain roads, or a truck on a loaded route. EPDM and SBR compounds are compatible with both, and mixing the two fluids in one system is a service issue rather than a parts issue.

Still have a question?

Send it with your part numbers or vehicle details and we will answer it in writing, usually within one working day.

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