NPS 18" Adjustable Height Steel Stool, Grey VERSATILITY: Our heavy duty grey steel stool is dependable and sturdy, ideal for use in industrial and educational settings. Popularly used in art rooms, science labs, classrooms, and as a bar stool or shop stool. SPECIFICATIONS: 18 Height appropriate for seating at your 30 table. 7/8 thick tubing on frame is made using 18 gauge steel. Large comfortable seat is a full 14 diameter, with an 11 1/2 diameter Masonite board recessed into the pan. Lower legs protrude slightly in order to properly stabilize stool. The outer diameter of legs is 5/8. EASY TO MANEUVER: non-marring polypropylene 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.