
Hot Sale Retractable Spring Torsion Spring. 20 Years R&D Experience: Extensive manufacturing expertise in various spring types including compression, extension, and torsion springs. Wide Material Selection: Available materials include Carbon Steel, Stainless Steel, Alloy Steel, and Copper Wire. RoHS Certified Materials: All spring materials comply with European RoHS certification standards. Custom Design Support: Engineers provide design assistance, CAD/3D drawings, and prototype development services. Flexible MOQ Options: Supports both small quantity orders and large runs based on customer demand. Sample Charge Refund: Custom spring sample charges are refunded upon placement of a formal order. Multiple Certifications: Holds IATF 16949:2016, SGS, ROHS, and ISO9001 quality system certifications. Fast Lead Time: Typical delivery within 25 days for standard springs; 30-40 days for complex shapes.