Backless stool features a 16" round, vinyl-covered seat, 2" dual-wheel casters, and a chrome five-star base. Functions include pneumatic seat-height adjustment from 17" to 22-1/2" and 360-degree swivel. Height adjusts easily in a 5" range with a lever under the seat. Stool holds up to 275 lb.Backless stool features a 16" round, vinyl-covered seat, 2" dual-wheel casters, and a chrome five-star base. Functions include pneumatic seat-height adjustment from 17" to 22-1/2" and 360-degree swivel. Height adjusts easily in a 5" range with a lever under the seat. Stool holds up to 275 lb.