ERGOTRON 45-475-216 HX Desk Monitor Arm, For up to 49" Screens, Capacity up to 42 lbs/Display, Easily lifts, tilts, swivels, and rotates, VESA MIS-D/E/F, Aluminum, WHITE With the HX Desk Monitor Arm, you can easily reposition large monitors weighing up to 42 lbs (19.1 kg) using patented Constant Force™ Technology.