punching part material :stainless steel .carmbon steel .copper alloy, zinc, nickel, brass, tin-plated steel , nickel silver; we 1.We specialize ... service; 5,our products are widely used in auto parts,electrical appliance, daily necessities,sport equipment, industrial components,office stationery; ... 1.Mould standerd : HASCO/DME/MUSUM; 2.main cavity material :MAK80/718/8407/.2344/1.2377/H13/S136 3.main ...