... ) main material: carbon spring steel ,alloy spring steel, refractory steel, stainless steel, high temperature resisting alloy, corrosion-resistant alloy and bronze.2) Finish: chromium ... steel wire, stainless steel wire, spring steel, brass, aluminum, copper, alloy, etcSurface treatmentpolishing, anodizing, zinc plating, nickel plating, etcTypeCompression springApplicationauto, toy ...