6200 Series Heavy-Duty Black Steel Stool is a comfortable, durable and attractive addition to any art room, science lab or classroom. The scratch-resistant black finish adds a contemporary touch to one of NPS's most popular stools. Each stool has sturdy legs made of 18-gauge steel tubing plus a foot ring that is welded to the stool at four different points for extra stability. Eight rivets on the Masonite seat prevent warping. Plastic glides keep your stool level and won't mar floors. Meets or exceeds ANSI/BIFMA standards. This National Public Seating 6200 Series Heavy-Duty Black Steel Stool has a fixed height of 18" and comes backed by a 10-year warranty.