Our ergonomic polyurethane stools feature a 360° all-around adjustment ring that can be operated from any position. These medium Bench height stools feature your choice of black rolling, non-marring casters (suitable for both hard and carpeted floors) or black, non-marring Bell glides (suitable for both hard and carpeted floors) on a nylon-reinforced fiberglass base. Our rugged polyurethane round Seat is self-skinning, chemical- and puncture-resistant, and fully washable. Optional foot Rings are available in 18 1/4-inch diameter, black, nylon-reinforced fiberglass or 18-inch diameter chrome.