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 and flexibility. Molded foam seat provides better support and added comfort. Arms adjust in height and 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 and 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.