Ignition ReActiv Low-Back Task Stool gives you control over your domain with the ability to either sit or stand at an adjustable-height workstation or bring people around standing-height collaborative tables. Charcoal ReActiv back features zonal comfort that delivers optimal support & flexibility. Molded foam seat provides better support & added comfort. Arms adjust in height & width to enhance your comfort. Other comfort functions include pneumatic adjustable height from 22-7/8" to 31-3/4", 360-degree swivel, limited recline synchro-tilt with seat slider, tilt tension & tilt lock. Sturdy, five-star nylon base glides on black hard casters for convenient mobility. Chair accommodates users up to 300 lb. Frame is black. Fabric seat upholstery is Black Centurion. Seat measures 18-1/2" wide x 16" deep. Back size is 17-1/2" wide x 19" high.