Lorell Managerial Mid-Back Chair,25-1/4"x23-1/2 x35-41-3/10",BK Managerial mid-back chair features a mesh back chair and mesh fabric seat. ergonomically designed 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 21"" high from the floor), 360-degree swivel, back height adjustment, tilt and asynchronous three-lever control. available in black frame only. meets the ca117 fire-retardant standard.