T-580 Ergo Task ChairPedigos ergonomically designed task chairs feature pneumatic height adjustment, dual wheel casters, 5 star base, integrated lumbar support, and independent backrest seat pan height and tilt controls. Features and Specifications: Weight capacity rating of 300 lbs. 18" x 19" contoured cushioned seat Height adjustment (pneumatic) of 17" to 23" Easy rolling 2" dual wheel casters 25" diameter footprint Adjustable backrest Adjustable arm rests Only