progressive metal stamping 1.material:carbon steel plate 2.finish:sandblast,powder coat 3.thickness:2mm~30mm progressive metal stampingStrictly quality ... partsMaterialcarbon steel, stainless steel, aluminum alloy, copperProcedurewelding,stamping,cutting,punching,bending,grinding,machining,threadingSurface finishingzinc plating, hot ... machine, rolling machine and so on. progressive metal stamping