Mid-Back Mesh Task Chair offers a thickly cushioned seat upholstered in fabric to match the comfort of the flexible, breathable mesh back with built-in, fixed lumbar support. Adjust the seat from 17-1/4" to 20" high and the nylon, padded arms from 23-3/8" to 26-3/8" high. Other functions include tilt lock, 360-degree swivel, and tilt tension adjustment. The five-star nylon base features dual-wheeled casters for easy moving. Seat measures 20-1/2" wide x 17-7/8" deep. Back size is 18-1/2" wide x 19-3/4" high. Weight capacity is 275 lb.