Mid-back chair offers a breathable mesh back that conforms to your body for better comfort. Fabric-upholstered, cushioned seat adjusts 19-7/8" to 23-3/7" in height and from 18-1/10" to 20-1/10" in depth to get just the right position for optimum working conditions. Arms adjust from 10-3/4" to 13-9/10" in height. Back tilt adjusts in three stages. Other functions include pneumatic seat-height adjustment and 360-degree swivel. Design also includes a 25-3/5" diameter five-star nylon base, black plastic frame and 60mm dual-wheel casters for easy chair movement. Weight capacity is 250 lb. Seat measures 18-1/10" x 18-9/10". Back size is 18-1/9" x 17-1/3"..