Extended-height drafting chair features a one-touch, pneumatic seat-height adjustment from 23" to 33" high. Back height manually adjusts 3-1/2". Seat depth adjusts as well and offers a 2-1/4" thick padded seat cushion for comfort and five-star nylon-reinforced base for strength and stability. Upholstery is 30 percent polyester, 70 percent olefin. Seat is 18-3/4" wide 16-5/8" deep. Back is 16" wide x 9-1/2" high. Chair supports up to 250 lb. and includes chrome-plated adjustable footring and five 2" dual wheel hooded casters for mobility. Greenguard Certified.