●U-shape seat and backrest made of blow moulded high impact polyethylene. ●1” aluminum frame, anodized. ●All four legs angle outward to prevent accidental slipping. ●Seat size: 13” X 19” (33 X 48cm) ●Adjustable seat height: 14-5/8” ~ 19” (37cm ~ 48cm) ●Backrest size: 13-3/8” X 19” (34cm X 48cm)