• High-performance ergonomic task chair features a contoured seat and back with built-in lumbar support as well as a sturdy metal frame • Built-in arms adjust in height from 7 to 9 and in width • Functions include pneumatic seat-height adjustment from 16-1/2 to 19, seat-glide mechanism, 360-degree swivel, tilt, tilt tension and tilt lock • With the seat-glide mechanism, seat cushion travels forward and back, and then locks into position • Seat measures 20 wide x 20 deep • Back dimensions are 19 wide x 19 high • Five-star base rolls easily on five 2 dual-wheel casters • Weight capacity is 250 lb