
Manufacture OEM Helical Torsion Springs Customized Adjustable Torsion Spring. OEM/ODM Customization: Full customization from samples or designs, including size, color, and material. Wide Material Selection: Available in SS, Carbon Steel, Alloy Steel, Stainless Steel, and Beryllium Copper. Fast Response Time: All inquiries and emails are replied to within 12 hours by professional staff. High Production Capacity: Supply ability of 10,000,000 pieces per month with professional R&D team. Quality Assurance: ISO9001-2016 certified with thorough inspection for durability and reliability. Free Sample Service: Free samples available from stock; customer only needs to arrange shipment. Multiple Payment Options: Accepts T/T, L/C, PayPal, and Western Union for flexible transactions. Global Shipping: Ships via sea, air, UPS, TNT, or FedEx from Shanghai or Ningbo ports.