ComforTask Pneumatic Stool offers a fully padded, 20″ wide x 18″ deep seat for extra comfort and a 16-1/4″ wide x 17-3/4″ high back contoured for lumbar support. Waterfall front seat edge provides under-thigh support. Functions include pneumatic seat-height adjustment from 21-3/4″ to 31-7/8″ high, manual back-height adjustment and 360-degree swivel. Footring adjusts from 7-1/8″ to 12-3/4″ high. Stool is certified by SCS to be in compliance with specific, indoor, air-quality emission requirements and meets or exceeds applicable ANSI/BIFMA standards.