Mid-Back Task Chair delivers reliable support and convenient functionality to enhance your workday. Tight, breathable mesh on the back matches the fabric color on the cushioned seat for a continuous look. Padded arms adjust in height. Functions include adjustable seat height from 18-1\/2" to 22" , 360-degree swivel, tilt tension adjustment and tilt\/tilt lock. The 12-3\/5" diameter, five-star nylon base is equipped with dual-wheel casters for easy movement. Seat measures 50-1\/2" wide x 17-1\/2" deep. Back size is 18-1\/2" wide x 17-5\/7" high. Weight capacity is 275 lb.