Boss Office Products B670-BK Heavy Duty Task Chair in Black Deluxe Heavy duty use Task Chair; 300lb capacity High Density Foam; Durableblack crepe fabric Curved ergonomic backfor excellentlumbar support; Padded arms incorporated intosteel wrap aroundstyle construction 2 paddlelocking heavy duty spring tilt mechanism with tension control 27"black powder coated metalbase with deluxeoversizecasters;Pneumatic seat height adjustment Deluxe Heavy duty use Task Chair with 300lb capacity High density foam Durableblack crepe fabric Curved ergonomic backfor excellentlumbar support 2-Paddlelocking heavy duty spring tilt mechanism with tension control