
Spring Coil Tension Drawbar Micro Garage Door Small Extension Springs. Custom Color Options: Available in Zinc, Chrome, Nickel, Silver, Gold, Tin, Powder coating, Oxide black, or customized colors. Wide Material Selection: Offered in Carbon steel, Alloy steel, Stainless steel, Music wire, and Beryllium copper. OEM and ODM Services: Full customization available from samples, designs, or flexible minor customization options. ISO9001 Certified Quality: Manufactured under ISO9001-2016 standards with rigorous inspection and quality control. Fast Response Time: All inquiries and emails are replied to within 12 hours by professional staff. Free Sample Availability: Free samples available for in-stock items; customer only needs to arrange shipment. High Production Capacity: Supply ability of 10,000,000 pieces per month with 33 employees and 5 technicians. Comprehensive Testing: Products undergo first testing, heat treatment, and final testing to ensure durability.