... 2) Thickness: 0.1-3.0mm 3) Width: 3-80mm Carbon Steel Coil Spring1) Material: 62Si2MnA, 65Mn, SK3,SK4, SK5, SUS301 ... in producing all classes of springs for Industrial machine,(ie. garden hose reels, balancer, Retractable Dog Leash, Ink Liner, ... in producing springs for various kinds of carbon and stainless steel products and supplies high elastic and heat treatment stainless steel &carbon steel.