Has a swivel feature pneumatic and height control. Perfect component for any home or office work area that needs drafting height. Stable 22 in. diameter and 5-star base on hooded casters. Has an adjustable height between 18 in. and 26 in. 13 in. Diameter seat is made of super soft molded foam. Molded foam seat. Versatile. No assembly required Get headed in the right direction with this compact, comfortable, ultra portable stool. Perfect for your busy work or school environment, it has a pneumatic lift and padded, upholstered seat for added support. Functional stool gives you supreme value at the right price.