Made of carbon steel, piano steel, SUS, alloy steel, iron, plated steel, copper, nickel plated series, zinc alloy, and plastic 1) Made of carbon steel, piano steel, SUS, alloy steel, iron, plated steel, copper, nickel plated series, zinc alloy, and plastic2) High quality and useful luxurious designs.3) Finishing: zinc plating, electrophoresis / electro plating.4) OEM service is available.