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. 5-inch -thick grey vinyl cushioning that will provide years of dependable use. The footrest ring is securely bonded to each leg with four-spot good contact points. Height-adjustable legs extend from 19 inches to 27 inches in 1-inch increments and adjustable padded backrests can be moved 2 inches up/down and forward/back.