Boss Black LeatherPlus Executive Chair. Ergonomic office chair with lumbar support and pneumatic seat height adjustment. Ergonomic office chair with lumbar support and pneumatic seat height adjustment Upholstered in black LeatherPlus; waterfall seat design eliminates leg fatigue Upright locking position and adjustable tilt tension control Weight capacity is 250 pounds; easy assembly upon arrival; no tools required Measures 26-1/2 inches wide by 28 inches deep; adjusts between 45 and 48-1/2 inches high