The fortified construction and soft comfort of the black 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"-diameter seat pan. Riveted through the steel pan is 0.5"-thick black vinyl cushioning that provides years of dependable use. The footrest ring is securely bonded to each leg with four spotwell contact points. Height-adjustable legs extend from 30.5"-38.5" in 1" increments and adjustable padded backrests can be moved 2" up/down and forward/back.