The Lab stools with back rest is the ideal seating option for an office, workshop or art studio! With a heavy duty steel construction and large proportions, this stool is built for everyday use. The frame is easily able to support up to 300 pounds of weight.Our Heavy Duty Steel Lab Stool is made from 7/8" 18-gauge steel tubing and features a full 14" diameter with an 11 1/2" diameter masonite board recessed into the seat pan (will not chip or crack). Its backrest measures 6" H x 12" W and each leg features foot rings welded to the bottom with 4 contact points at each leg for added rigidity. ANSI BIFMA approved up to 300lbs. Perfect for a workshop or classroom. Includes a 5-year manufacturer warranty. Lab Stool sold singly. Leg Height Adjusters available in a set of 4.