The rugged design of this Heavy Duty Steel Lab Stool features an 11 1/2" diameter masonite board recessed into the seat pan (will not chip or crack), and a 6" H x 12" W back rest. The frame of this chair comprises heavy-duty 18-gauge 7/8" steel tubing with grey powder coating and features foot rings welded to each leg at 4 contact points for added rigidity and durability. Tested to meet ANSI/BIFMA standards up to 300lbs. Perfect for a workshop or classroom. Includes a 5-year manufacturer warranty.