Manufacturer of springs for -Damper spring -CNC wire bending- Rocking chair springs -Mattress springs-Battery springs-Spring coil-Disc spring-Stainless steel spring -Brake spring- Bonnell spring- Certification: : TS16949, 13485, ISO9001, 14001 Application: Automobile/aviation/medicalequipment/furniture / Mechanical Professional manufacturer of all kinds of coil springs, spring steel, compression springs, torsion springs, extension springs, annular springs, disc springs, Application to Automobile/aviation/ Medical-equipment/furniture /Mechanical and Production WIRE DIAM.: 0.01-80mm Wholesale Large Annular Springs, Customized Design 1>Our products can be made according to your requirement. 2>Superior quality, competitive prices, first-class craftworks, safe Package and prompt delivery and reasonable price. 3>We do quotation within 24 hours and welcome your any inquiry at Any time. 4>Please provide us the following information before we quote to you. (1). Wire diameter (2). Material (3). Free length (4). Maximum outside diameter, minimum inside diameter (5). Number of coils 5>Normal ratio between wire diameter and inside diameter is 1: 2.5, And We have successfully achieved 1: 1 6>More detail please call or email to me directly, Get best price from me!