Set of 2 Black Adjustable Height Pneumatic Round Roller Stool with Chrome Base. Set of 2, Easy-to-Use, Pneumatic height-adjustable roller stool with upholstered PU comfort cushion seat. Height Adjustable from 20" - 26.5" High; Seat Diameter: 14. 5-leg Dual wheel casters allow for easy movement and 360 degree swivel.Stylish chrome finish for base and pneumatic lift. Black PU seat easily maintained and cleaned. Maximum load capacity 264 lbs/120 KG.