Managerial mid-back chair features a mesh back for conforming comfort. Ergonomic mid-back matches the natural curvature of a person's back. Arms adjust in height and width. Mid-back chair also offers a five-star nylon base, pneumatic seat-height adjustment (17" to 20-9/10" high from the floor), 360-degree swivel, back-height adjustment, tilt and asynchronous three-lever control. Frame is available in black only. Chair meets the CA117 fire-retardant standard and offers an abrasion rating of 60,000 double rubs (ASTM-D-4175).