The Brewer Foot-Operated Millennium Series Surgeon Stool has an ergonomic design, featuring a hands-free foot pneumatic height adjustment and optional locking casters. PRODUCT BENEFITS Five-leg base for overall support 18.5" wide contoured poly-foam seat cushion for maximum comfort Hand-free foot pneumatic height adjustment gives surgeons the most flexibility during procedures 50 standard colors 250 lb. weight capacity 5 year warranty