Polypropylene seat and backrest. Steel 7/16" rod. bright duplex nickel chrome. Powder coat frame option. tablet arm is available in two sizes. Standard size. Standard size has resin core: pressure laminate surface-available on request. Oversized has plywood core with clear lacquered edge. CS-OEI-001/R - Right Hand Tablet Arm - Oversized Tablet, Poly Seat & Back with Polycarbonate Glides