Compatibility: Dual Vertical Stack Mount Fits Most Screens up to 32 inches. The heavy-duty C-clamp is integrated with a two-stage locking system and fits any desk up to 3.62 inches in thickness and optional Grommet-Base fits the desk thickness up to 2.56 inches Double Benefits: Double efficiency and productivity to make working or relaxing that much more comfortable. Open up available desk space can help to provide a new range of adaptable positions for your displays Extra Tall Pole: The 39 inch height pole provides you with more adjustment space for your monitor. Double efficiency and productivity by opening up desk space allow working in a more comfortable, ergonomically correct position to reduce neck and eye strain Multiple Adjustment: The high-grade arms extend and retract, +/-90 degree tilt and swivel to change reading angles, and 360 degree rotate from landscape to portrait mode Package Includes: 1 x WALI Dual Monitor Mount, Mounting Hardware Kit, User Manual, experience