Fits 13' To 27' Screens - Extra tall dual monitor mount fitting two screens 13 to 27 in size and 22 lbs in weight each with 75x75mm or 100x100mm backside mounting holes. Mounts to desks (up to 4' thick) with heavy-duty C-clamp or optional grommet mount. Extra Tall Pole - The 39 center pole allows you to adjust the monitors between sitting and standing positions. Integrated cable management is included to keep AV and power cords clean and organized via clips along the arm and center pole.