National Public Seating 6224HB-CN Steel Stool with Hardboard Seat Adjustable and Backrest, 25"-33", Grey (Pack of 4) VERSATILITY: Our heavy duty grey steel stool is dependable and sturdy, ideal for use in industrial and educational settings. Popularly used in art & science classrooms, and as a bar or shop stool. VERSATILITY: Our heavy duty black steel stool is dependable and sturdy, ideal for use in industrial and educational settings. Popularly used in art & science classrooms, and as a bar or shop stool. SPECIFICATIONS: 24 Height with 7/8 thick tubing on frame is made using 18 gauge steel. EASY TO MANEUVER: Heavy duty steel stool includes non-marring floor glides to prevent scratching your flooring, and to ensure a smooth and fast glide around the room for easy setup and storage. WARRANTY: National Public Seating stands behind its products. Offering an industry leading 10 year full Warranty.