Task chair offers a smart design and aims to renew more than the working environment. Comprised of components that were selected to maximize use of recycled materials, the Sol Task Chair allows a great impact indoors and less impact out. Design helps support individuals as well as the planet. Beautiful swooping back hugs a steel frame with sleek metal accents. Functions include a synchro-tilt mechanism with locking positions, tilt tension control, 360-degree swivel, and pneumatic seat-height adjustment from 17-1/2" to 20-1/2". Task chair also features a weight capacity of 250 lb., five-star base and 2-1/2" diameter, dual-wheel carpet casters. Seat size is 19" wide x 19" deep. The back measures 18-1/2" x 21" high. Arms are not included.