... , tinplate), aluminum alloy, red copper, brass, bronze alloy are available.2. surface treatments are available: polishing, zinc plating, nickel plating, powder coating, e-coating ... MaterialStainless steel, iron ( SPCC, SECC, SPTE, tinplate), aluminum alloy, red copper, brass, bronze alloy are available.B Workmanship for manufacturingCNC Laser Cutting ...