Belleze Mid-Back Mesh Chair Multifuntion Computer Chair, Black Tilt tension adjust allows you to adjust the tension on which the chair tilts back, allowing for personal customization Tilting option which allows the usee to sit back in a more comfortable position Fixed arms provide hours of comfortable support height adjuster handle also acts as a tilt lock, locking in the upright position Seat Dimensions- 19"(W) x 18-1/2"(D) Back Dimension - 19"(W) x 27"(H)