... arcylic and zinc alloy base 1.Material: iron, zinc alloy, aluminum alloy, resin2.Surface Treatment: electroplating, painting 3.Diameter& Color & Thickness ... 2)adjustable or fixable bracket 3)material:steel,zinc alloy,aluminum,as per customer's resquest.3.Rings 1)metal or ... 2)adjustable or fixable bracket 3)material:steel,zinc alloy,aluminum,as per customer's resquest.3.Rings 1)metal or ...