... Motorcycle, Accumulator Car, Bicycle, Fitness Equipment, Elevator, Steel Wire Screen, Mattress And Sofa, Umbrella Frame, Electronic Products, ect ... extension spring, agricultural machines, die springs, strip & wire forming springs.SpecificationsDia 0.20-12.50mm Grade 35- ... AISI, ASTM, BS, DIN, GB, JISPlace of Origin: Jiangsu, China (Mainland)Type: SpringSpecial Use: Cold Heading SteelProduction capacity ...