22\" (55. 9 cm) tall pole provides configuration flexibility. Ideal for larger displays Add a third or fourth display using the accessory LX Arm, Extension and Collar Kit Position monitors for maximum ergonomic comfort with unparalleled range of motion Helps reduce eye, back and neck strain Folding arms free up space in constrained areas Two-piece mounting clamp has keyhole-shaped holes for quick assembly and two clamping screws for secure installation Easily turn one or both screens from landscape mode to portrait mode--view entire pages without scrolling Passes Ergotron\'s 10, 000-cycle motion test, which ensures years of trouble-free height adjustment Patented Constant Force(TM) lift-and-pivot motion technology