Mid-back Task Chair is designed to provide comfortable support for those who spend more than half the day at their desk or computer. As part of the HON Ignition Seating Series, this chair is perfect behind a desk or around a conference table. Deeply sculpted lumbar support cradles the lower back. Synchro-tilt and independent back angle deliver an exceptional range of motion. Other functions include pneumatic seat-height adjustment from 17-1/2" to 22", seat-glide mechanism, back-angle adjustment, ratchet back-height adjustment from 21" x 24", 360-degree swivel, tilt, tilt tension, tilt lock and synchronized knee tilt. Back width is 18-1/2". Arms adjust in height up to 11" and in width up to 19-1/2". Weight capacity is 300 lb. Design also features fabric upholstery. a 26" diameter, five-star base made of plastic. and dual-wheeled casters for easy mobility. Seat and back structures are made from recycled wood for strength and sustainability. Seat measures 20" wide x 19" deep..