... Coil Spring 1) Material: 62Si2MnA, 65Mn, SK3,SK4, SK5, SUS301,304 2) Thickness: 0.1-3.0mm 3) Width: 3-80mm Carbon Steel Coil ... 3-80mmOur company are a professional manufacturer specialized in producing all classes of springs for Industrial machine,(ie. garden hose reels, balancer ... , electrical machine ,start-up machine,etc.),constant force spring for door ,windows ,electric fans ,machines of lift and ...