... bright,white,blue, polished, yellow, blackHardness: 40-55HRC for hardened and tempered processEdge: slit, round, squarePacking: each ... steel toe cap, steel insole, spring metal part, lawn mower blade, wiper blade, agricutural tool, etc.Quality controlGWYL ... high strength, toughness, hardness and elongationGood tolerance for thickness controlledColoured Tempred steel strip 50CrV4 alloy spring steel ...