Extra Tall Monitor Mount: Designed with a 39" height adjustable center pole to keep you comfortable and productive while you stand or sit, ergonomically correct position and increase your work efficiency. Please confirm your desk's thickness carefullly before purchasing. Universal Compatibility Single Monitor Arm: Fits most 13-32 Inch screen, ultra wide screens up to 38 inches and supports weight up to 22lbs. Mounting plates detachable compatible with VESA mounting holes 75x75mm and 100x100mm