1 Each. Mesh task chair offers life from a new perspective - one of comfort, performance and design. The ultimate in task seating, the Vue Intensive-use Mesh Task Chair is rated for 24/7 use. Nylon mesh back offers ample support and ergonomic shaping to provide all-day comfort and prevent fatigue. The breathability of the mesh keeps you cool and comfortable throughout every workday - no matter how many hours you put in. Functions include back tilt lock, pneumatic seat-height adjustment from 17-1/2" to 20-1/2" , back-height adjustment from 14" to 17-1/2" , and 360-degree swivel. Task chair also features a weight capacity of 500 lb., 100 percent polyester seat, five-star base and 2-1/2" diameter, dual-wheel carpet casters. Seat size is 20-1/2" wide x 20" deep. Back measures 18-3/4" wide. Arms are not included.