Carbon Steel Coil Spring 1) Material: 62Si2MnA, 65Mn, SK3, ... Thickness: 0.1-3.0mm 3) Width: 3-80mm Carbon Steel Coil Spring1) Material: 62Si2MnA, 65Mn, SK3,SK4, SK5 ... Leash, Ink Liner, Measuring Tape,meters and toys, cars safety belts, gas, diesel oil , electrical machine ,start-up ... are specialized in producing springs for various kinds of carbon and stainless steel products and supplies high elastic ...