Last updated: June 1, 2026
Yeyuan Precision Technology Co., Ltd. stands behind the quality of our materials and machining. All products undergo quality inspection before shipment. Material certifications (mill test certificates, composition analysis, mechanical property reports) are available upon request.
CNC machined parts are manufactured to your drawing specifications and tolerances. We perform dimensional inspection before shipment and can provide inspection reports. Parts that do not conform to agreed specifications will be re-machined or refunded at our discretion.
Engineering plastic sheets, rods, and tubes are supplied to standard commercial tolerances unless otherwise specified. Claims for material defects must be submitted within 7 days of receipt with supporting evidence (photos, description of defect).
Returns are accepted in the following cases:
The following are generally not eligible for return:
To initiate a return:
Refunds are processed within 14 business days after confirmed receipt and inspection of returned goods. Refunds are issued via the original payment method. Shipping costs are refunded only when the return is due to our error.
Standard material orders may be cancelled before shipment without penalty. Custom-machined part orders: cancellation terms are agreed per order. Once machining has begun, cancellation may incur charges for work completed.