"This National Public Seating Ergonomic Z Stool with Backrest provides even greater comfort and support for long periods of sitting. Material 12-ga. steel, Capacity lbs. 300, Dimensions W x H in. 16.75 x 24, Height Range in. 24. Ergonomic seat Footrest 12-gauge chrome-plated tubular steel frame Oversize floor glides for safe use on a variety of floor surfaces"