Confirm the seal model, inside diameter, outside diameter and width, then check the shaft and housing tolerances, sealing medium, operating temperature, pressure, rotational speed, lubrication and installation method. Oil-seal performance depends on matching all of these conditions—not dimensions alone.

Please send the required dimensions, seal structure or reference model, material preference, medium being sealed, temperature range, pressure, shaft speed, quantity and application. Drawings, clear photographs and existing part markings are also helpful.

Any recommendation is general unless your application and specification have been reviewed and confirmed by us in writing. The buyer should verify the final model, material and working conditions before purchase and installation.

Keep seals clean, dry and protected from deformation, contamination, direct sunlight and unsuitable temperatures. Installation should be performed with appropriate tools by qualified personnel, without damaging the sealing lip, shaft or housing. Follow the confirmed product specification and equipment instructions.

Yes. We can review custom-size, custom-material, made-to-order and specially manufactured requirements. Feasibility, tooling, quantity, price and lead time are confirmed through a written quotation before production.

Made-to-order, custom-size, custom-material and specially manufactured products normally require approximately 15–60 calendar days before shipment. Actual timing depends on the model, size, material, quantity, production schedule and raw-material availability.

The minimum quantity can vary by product, size, material and whether tooling or special production is required. Send us your target quantity and specification and we will confirm the applicable MOQ in the quotation.

Customized, made-to-order, specially manufactured or modified products are normally non-returnable unless they are defective, damaged, incorrectly supplied or otherwise non-conforming. Mandatory consumer rights remain unaffected.

We accept PayPal and any other payment methods displayed at checkout or confirmed in writing. Payment may be subject to identity, address, authorization and fraud-prevention checks.

An automated confirmation acknowledges receipt of your order but may not be final acceptance. An order is generally accepted when payment is approved and the order is confirmed for fulfillment, or when acceptance is otherwise stated in writing.

You may request a cancellation or address change within 2 hours after placing the order, provided fulfillment, production, customization or shipment has not started. Email preqseal@gmail.com immediately. A request is effective only after written confirmation.

Orders are dispatched from China. We currently ship to the United States, Vietnam, Thailand, Malaysia, Singapore and the Philippines, subject to carrier availability, customs rules, product restrictions and destination exclusions.

Standard in-stock orders are normally processed within 3 business days after cleared payment, address verification and any required order or compliance checks. Weekends and public holidays at the shipping origin are not business days.

After dispatch, estimated transit is approximately 15–20 calendar days to the United States and 9–15 calendar days to Southeast Asia. These are estimates, not guarantees. Customs clearance, remote-area delivery and carrier disruptions may add time.

Our standard shipping term is DAP unless another term is confirmed in writing. Under DAP, the recipient is responsible for import clearance, duties, taxes, brokerage, permits and local charges. Any DDP or duties-paid arrangement must be expressly confirmed for the specific order.

When available, tracking information is sent to the email address or account associated with the order. If tracking has not updated or the parcel appears missing, contact us. We generally begin a carrier trace after 3 business days beyond the estimated delivery date or last meaningful tracking scan.

Unless otherwise stated, you may request an eligible standard return within 15 calendar days after confirmed delivery. Contact us before returning anything. Products must normally be new, unused, uninstalled, clean, complete and in their original packaging.

Products that have been installed, tested in machinery, lubricated, altered or damaged through improper handling are not eligible for a discretionary return. This does not remove remedies for an eligible defect, seller error or mandatory consumer right.

Report visible shipping damage, missing items, incorrect products or apparent manufacturing defects within 7 calendar days after delivery. Include the order number and clear photos of the outer package, shipping label, internal packaging, product markings, dimensions and the problem.

Approved refunds for returned products are normally initiated within 15 business days after the goods are received, inspected and approved. Refunds are normally issued to the original payment method; your bank or payment provider may need additional posting time.

For complete terms, exceptions and mandatory-rights information, review our Terms of Service, Shipping Policy, Return & Refund Policy and Privacy Policy.