●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: 11-3/4” X 19-5/8” (30 X 50cm) ●Adjustable seat height: 13-1/8” ~ 20” (33.5cm ~ 51cm) ●Backrest size: 12-1/4” X 19-5/8” (31 X 50cm)