Product details:

Ideal for science labs, artist studios and workshops and particularly practical in educational settings, National Public Seating's height-adjustable stools stand up to constant use, adjust to suit your surroundings and clean up with ease. Height-adjustable to fit a wide-range of desks and worktops. Cushioned vinyl seat is not just comfortable, it's hard-wearing and easy to clean too. Heavy-duty 18-gauge steel tubing frame is strong and sturdy. Foot ring for feet that would rather not swing free. Weight capacity tested to support up to 300 lb. All black design fits in to most settings. Overall dimensions 38" - 47 1/2" (adjustable) x 15 1/4" x 15 1/4".