
Durable Customized Tension Spring with ISO 9001 for Furniture. 50+ Years Experience: Over 50 years of production experience with integrated design, development, and sales. Full Customization: Customizable size, wire diameter, surface treatment, color, and helical direction. Wide Material Range: Available in Spring Steel, Carbon Steel, and Stainless Steel with diameters 0.2mm-14mm. Direct Factory Sales: Factory price direct sales with no middleman markup and better prices for larger quantities. ISO 9001 Certified: Manufacturing process certified under ISO 9001 standards for quality assurance. Fast Delivery: Standard delivery time ranges from 7 to 15 working days. OEM/ODM Service: Professional technical team supports OEM and ODM orders based on customer drawings. Sample Availability: Samples are accepted before bulk orders to confirm quality and specifications.