Pneumatic height stool with back features a 16" round vinyl covered seat, dual-wheel casters, and a chrome base. Functions include pneumatic seat-height adjustment from 17-1/2" to 22-3/4" , back-height adjustment, seat-depth adjustment and 360-degree swivel. Back measures 16" wide x 10" high.Easy rolling with 5 dual-wheel castersLarge, cushioned seat with easy-to-clean vinyl covering5-1/2" seat-height adjustment rangeOther comfort controls: seat-depth adjustment and 360-degree swivelShiny chrome base for a professional look