
Heli Spring Manufacturer Customized Auto Parts Spiral Tension Spring. 29 Years Manufacturing Experience: Extensive R&D and production history since 1992 with over 150 modern machines. Full Customization Options: Customizable from samples, designs, or full customization with flexible options. Wide Material Selection: Carbon steel, stainless steel, alloy steel, copper wire, and more available. Comprehensive Surface Treatments: Zinc, chrome, nickel, gold, powder coating, oxide black, and phosphorization. IATF 16949 Certified Quality: Passed automotive quality management system certification in December 2017. Fast Delivery for Stock Items: 3 days delivery for stock items, 7-20 days for customized orders. Free Samples for Stock Items: Free samples available for stock items, shipping cost applies. OEM and ODM Services: Full OEM and ODM services available for custom spring manufacturing.