Desk Mount Monitor Arm. Free up desk space and work in comfort with this premium desk mount monitor arm - Heavy duty monitor arm for up to 30" VESA mount monitors (75x75, 100x100) or iMac / Apple Cinema or Thunderbolt Display (hardware included) - Desk clamp or grommet hole mount - Articulating arm monitor mount with height adjustment along the pole - Single monitor desk mount features tilt and pan and rotation - Easy tool-less assembly - Stable aluminum design supports max weight of 30.9 lb. (14 kg).