Our ergonomic polyurethane tractor stools are constructed from our rugged polyurethane that is self-skinning, chemical- and puncture-resistant, and fully washable, and feature your choice of chrome-hooded casters or black glides on a polished cast aluminum base. Optional foot ring is available in 18-inch diameter chrome. Each ergonomic stool is backed by our 15-year warranty, lifetime on the pneumatic cylinder.