Mesh task chair offers a mesh back and bonded leather seat. Functions include pneumatic seat-height adjustment from 17-3/10" to 20-3/10" , 360-degree swivel, tilt and tilt tension. Mid-back chair also features a five-star, steel tube base with hooded double-wheel casters for easy chair movement. Sturdy arms are made of polypropylene.Mesh task chair offers a mesh back and bonded leather seat. Functions include pneumatic seat-height adjustment from 17-3/10" to 20-3/10" , 360-degree swivel, tilt and tilt tension. Mid-back chair also features a five-star, steel tube base with hooded double-wheel casters for easy chair movement. Sturdy arms are made of polypropylene.