Top Medical Spin Lift Stool 20.5" - 28" - Royal Vinyl - Black Casters 15 Year Warranty - Lifetime on Cylinder - 5 Year Upholstery Height: Medium Bench Height 20 "-28". Spin lift height adjustment system. Seat: Width 17", Thickness 3 ". Base: 4-leg 21" chrome screw lift base with fixed footring. Casters: Comes with standard black rolling, non-marring casters (suitable for both hard and carpeted floors). 50 Vinyl and 5 Fabric colors available. Vinyl: Highly durable molded polyurethane foam cushioning covered with fully washable antibacterial/antimicrobial vinyl. Our upholstered vinyl chairs are protected by an industrial strength stain resistant finish. Exceeds ANSI / BIFMA standards. Weight capacity: 300 lbs. Made in the U.S.A.