... , zinc alloy, iron, plastic, resin. Stainless steel Brackets: aluminum alloy, zinc alloy, iron, Stainless steel Rings: iron, plastic, aluminum ... alloy, zinc alloy Tube: steel, aluminum, stainless steel2.colors: electroplating( antique brass, cooper, nickel mat, ... brushed nickel, nickel black, chrome, brass, stainless steel) , paint and powder coating( normal color: black ...