1629 - Accessible Panel Assembly The Chime Set shall be cut from 0.75" O.D. 18 gauge steel tubing and will be Powder Coated as specified. The Mosaic Block shall be injection molded using a high durability plastic for optimum thermal and UV stability. The Mosaic Block Axel shall be cut from 0.75" O.D. 18 gauge steel tubing and will be Powder Coated as specified. The Panels, Retainers and Sliders shall be made from high density 3/4" sheet plastic specially formulated for optimum UV stability and color retention. The Mounting Insert shall be precision die-cast from a high strength aluminum alloy.