Pneumatic task stool offers a molded 20" wide x 18" deep seat and 18" wide x 18-1/2" high back with pronounced lumbar support. The seat has a 3/8" foam topper on a 3-1/2" sculpted urethane foam cushion. The back has a 1-1/2" thick urethane foam cushion. Functions include pneumatic seat-height adjustment from 22-1/2" high to 32-1/2" high, quick-release back-height control and 360-degree swivel. Footring adjusts from 7-1/8" high to 12-1/4" high. Five-star base has hooded 2" dual-wheel casters. Stool is certified by SCS to be in compliance with specific indoor air quality emission requirements. Meets or exceeds applicable ANSI/BIFMA standards. Available in black frame only.