Stool: Single Lever Adjustment Seat: Round Arm: Ratcheting Cylinder: Tall Foot Ring: Adjustable Base: Metal Casters: Hard floor Cushioning: High Resilience Molded Foam Upholstery: Medical Grade Vinyl Full tilt adjustment allows the medical or dental user to sit comfortably while working. Contoured, deep seat is perfect for medium to tall users. Superior cushioning creates unparalleled comfort. Carpet or hard floor casters glide easily in any environment. Five-leg powder-coated aluminum base provides improved stability. The choice of different height lift mechanisms provides a wide range of adjustment. Specifications: Weight: 35 lbs Stool Base Diameter: 23" Floor Seat Height: 23" - 30" Seat Measurements: Diameter 15"