Thick padded seat and back with built-in lumbar support, Waterfall seat reduces stress to your legs, Back depth is adjustable, Pneumatic seat height adjustment, 5 star nylon base allows smooth movement and stability, Hooded double wheel casters, Dimensions: Seat Size: 17.5-inch W x 16.5-inch D, Seat Height: 18.5-23.5-inch, Overall Size: 17.5-inch W x 25-inch D x 35-inch -40-inch H