Multi-task chair offers a breathable mesh back & cushioned seat upholstered in fabric for your comfort. Functions include pneumatic seat-height adjustment from 17-1/2" to 21-3/4" high & 360-degree swivel. 23-3/5" diameter, five-star nylon base is equipped 50mm, hooded, dual-wheel casters for easy mobility. Weight capacity is 275 lb. Seat measures 19-1/4" wide x 18-1/4" deep. Back size is 17-3/4" to 17-1/4".