Executive high-back chair features active lumbar support and a mesh screen back. Mesh screen back provides increased breathability while adjustable padded lumbar support maintains the natural curve of your spine. Functions include one-touch pneumatic seat-height adjustment, 360-degree swivel, tilt, tilt tension, tilt lock, and synchronized knee tilt (2-to-1 synchro tilt). Head rest adjusts in height and depth. Arms have soft pads and adjust in height. Seat size is 21-3/4" wide x 19-1/2" deep x 4-1/2" high. Back size is 20-1/2" wide x 32-3/4" high. Distance between arms is 19-1/4". High-back chair features a thickly padded contoured mesh seat, heavy-duty metal base, and oversized, dual-wheel carpet casters.