Boss Office Products B7901 Caressoft Executive High Back Chair in Black Beautifully upholstered with ultra soft and durable Caressoft upholstery Executive High Back styling with extra lumbar support Padded armrests covered with Caressoft upholstery; Adjustable tilt tension control Large 27" nylon base for greater stability; Hooded double wheel casters Upright locking position; Pneumatic gas lift seat height adjustment