... :GB4357-89;DIN17223;JIS3512-9;EN10270-1;70# 72B Mattress Spring Steel WireSpecificationDiameter: 0.3mm-5.5mmWeight of coils:100kgs or ... ±0.002Tensile strength1270--2290 b/MPaUsageUse for making Bed spring wire, Spring steel wire, Rope making wire, Tire wire, Spoke wire ... cutting wire, Border wire (may straightening and straight ruler)Packingpacking coil, Iron Shelf, reel bag, paper drum, carton and so ...