... :Iron, Aluminum Alloy, Zinc Alloy, Plastic, Crystal, Resin, WoodenDiameter:16, 19, 22, 25, 28mm etc.Color:Antique-brass, Antique ... (aluminum)3. BracketMaterial:Iron, Aluminum, PlasticDiameter:16, 19, 22, 25, 28mm etc.Color:Antique-brass, Antique-copper, Satin ... Oxidation (aluminum)4. RingMaterial:Iron, PlasticDiameter:16, 19, 22, 25, 28mmetc.Color:Antique-brass, Antique-copper, Satin-nickel ...