... , zinc plating, nickel plating, chrome plating.5.Made of carbon steel,piano steel,SUS,alloy steel,iron,plated steel etc..6.with ... .8-M10Surface FinishingZn- Plated,Ni-plated,Passivated,Tin-plated,Sandblast and Anodize,Chromate, Polish,Electro Painting,Black Anodize,Plain,Chrome plated,Hot Deep Galvanize(H ...