The fortified construction and soft comfort of the 6400 Series heavy-duty padded stools with backrests are ideal for hands-on educational settings like art rooms, science labs, home economics or shop classrooms. These reliable stools feature a sturdy frame of 18-gauge steel tubing securely welded to a 14 inch diameter seat pan. Riveted through the steel pan are 0.5 inch thick vinyl cushioning that will provide years of dependable use. Footrest ring is securely bonded to each leg with four spotweld contact points. Height-adjustable legs extend from 25 inches to 33 inches in 1-inch increments and adjustable padded backrests can be moved two inches up\/down and forward\/back.