Sturdy 0.88' O.D. 18-gauge steel tubing with fixed legs. Seat is 14' diameter with an 11.5' diameter, 0.5' vinyl padding riveted through the steel seat pan. Foot rings with 0.63' O.D. are welded to each leg by four contact points for added rigidity. Features vinyl padded backrest that is 6' h x 12' w and adjusts up/down and forward/back. Features height adjustable legs that adjust in 1' increments up to eight additional inches. 4.75 mm MDF board, with rivet heads fully embedded.