Boss Office Products B8306-BK Mid Back Fabric Managers Chair in Black Passive ergonomic seating with built in lumbar support Upright locking position Pneumatic seat height adjustment Adjustable tilt tension control Large 27" nylon base for greater stability; Hooded double wheel casters Ergonomic mid-back chair with lumbar support and pneumatic seat height adjustment Upholstered in black fabric; large 27-inch nylon base for greater stability Hooded double wheel casters; upright locking position and adjustable tilt tension Weight capacity is 250 pounds; requires easy assembly upon arrival Measures 27 inches wide by 27 inches deep; adjusts between 40-1/2 44 inches high