... Alloy, Zinc Alloy, Plastic, Crystal, Resin, WoodenDiameter:16, 19, 22, 25, 28mm etc.Color:Antique-brass, Antique-copper, Satin-nickel, Matte-nickel, Black,Satin-black etc ... -black etc. as per request.Surface:Electroplating, Electric smelting, Spray painting, Flame plating, Oil injection and Oxidation (aluminum) Iron, Aluminum Alloy, Zinc Alloy, Plastic ...