... steel,copper,steel,aluminum,copperSurface Finish:nickel plated,white zinc,black zinc,color zinc,black ... ,C10B21,C10B33Specification& gaugeM0.8-M10Surface FinishingZn- Plated,Ni-plated,Passivated,Tin-plated,Sandblast and Anodize,Chromate, Polish,Electro Painting ... ,Black Anodize,Plain,Chrome plated,Hot Deep Galvanize(H ...