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dish tin plated battery contact While we have listed some of the most common sizes, materials and manufacturingspecifications, Henp Spring provides completely customized production on all parts. If youdon't see the part you need listed here, don't hesitate to contact us. Whatever yourneeds,Henp Spring Do It! product category compression spring,extension spring,torsion spring,shaped spring,wire product Wire Diameter We manufacture extension springs with a wire diameter of 0.08mm to 14.0mm Wire Selection rectangular, round, square or special-section. Round being the most adaptable. Wire Material carbon steel,stainless steel, manganese steel wire, nickel wire, galvanized wire,alloys arethe most common materials we use to manufacture extension springs Applications Our springs go into many applications for diverse industries that require highquality coil springs,auto, motorcycle, electronics, machinery, sports goods, equipment, toys,etc surface treatment spray-painted,zinc,nickel,chrome,gold,silver,tin,etc