... 1.21years Manufacturing experience 2.Diameter:0.2-13mm 3.Tensile :400~500MPa 4.Low price 65Mn Carbon Steel Wire for Mattress ... spring, mechanical spring, seating spring, mattress spring production.3. We can produce ... 1.Application: Can be used in umbrella frame, tension spring, compression spring, mechanical spring, seating spring, mattress ... Steel Wire for Mattress Spring (Diameter:0.2mm-13mm ) ...