Safco SitStar Stool features a height-adjustable polyurethane foam tractor-shaped seat with sturdy, 5-star base for years of reliable use. Adjustable foot ring may help improve circulation by reducing pressure points in legs while seated. Pneumatic lever provides easy height adjustment for a comfortable, personalized fit. Five-star chrome base with swivel wheels allows easy 360-degree motion and performs well on carpeting as well as smooth surfaces for optimum usability. Ideal for industrial or construction environments as well as storage rooms, production areas, warehouses, auto garages and receiving areas.