Contoured back and seat help to relieve back-strain Adjustable height arms Back angle adjustable Back height adjustable Pneumatic gas lift seat height adjustment Euro-style nylon base with heavy duty dual wheel casters Strong 20" diameter chrome foot Can upgrade with glides to replace wheels to stop chair from rolling Weight capacity: 250 lbs Specifications Back size: 17" W x 16" H Seat size: 20" W x 18" D Seat height: 26" - 31" H Overall dimensions: 39" - 44" H x 26" W x 26" D