Managerial mid-back chair features pneumatic seat-height adjustment from 16-3/4" to 21-3/4" high, 360-degree swivel, tilt, tilt tension and tilt lock. Cushion design provides lumbar support and helps eliminate fatigue. Molded polymer, outer back shell is color-coordinated with base. Chair also has a painted oval, steel frame and matching molded polypropylene armrests and base caps. Seat size is 20" wide x 18" deep. Usable seat depth is 17-3/4". Back measures 21" wide x 14" high from the seat. Distance between arms is 18-3/4". Five-star base has 2" hooded dual-wheel casters. Chair is available black frame only. It is certified by SCS to be in compliance with specific, indoor, air-quality emission requirements. It also meets or exceeds applicable ANSI/BIFMA standards.