Safco 3461CH Ambition Pushbutton Mid-Back Swivel/Tilt Chair, Charcoal Seat Height 17 to 21-inch Seat Size 21-1/2-inch w by 20-1/2-inchd Back Size 19-1/2-inch w by 18-inchh Tilt with tilt lock and tension control Upholstery 100% Polyester