Boss Office Products B1016-BE Any Task Mid-Back Task Chair with No Arms in Blue Mid-back styling with firm lumbar support; Elegant styling upholstered with commercial grade fabric Sculptured seat cushion made from molded foam that contours to the shape of your body Ratchet back height adjustment mechanism; Optional adjustable height armrests Large 27" nylon base for greater stability; Pneumatic gas lift provides instant height adjustment of the seat Adjustable tilt tension; Hooded double wheel casters; Upright locking position Mid-back styling with firm lumbar support Elegant styling upholstered with commercial grade fabric Sculptured seat cushion made from molded foam that contour to the shape of your body Ratchet back height adjustment mechanism which allows perfect positioning of the back cushion and lumbar support Large 27-inch nylon base for greater stability