This versatile polyurethane stool is ideal for any home or office work area that needs drafting height seating. Ideal for extended sitting periods, it has a swivel feature, pneumatic height control, and an adjustable height between 17.3 to 24.8. The 13 diameter seat is made of super-soft molded foam. Also features a stable, 22 diameter, five-star base on hooded casters. Puncture resistant, easy to clean, and maintenance free. Black.