... ) Thickness: 0.4-0.7mm 3)Width:4-8mm Starter spring/Springs for starter assy of engines1) Material: 62Si2MnA2) Thickness: 0. ... are a professional manufacturer specialized in producing all classes of springs for Industrial machine,(ie. garden hose reels, balancer, Retractable ... machine,etc.),constant force spring for door ,windows ,electric fans ,machines of lift and down.Our springs are widely use all ...