ERGOTRON 45-478-216 HX Wall Monitor Arm, For up to 49" Screen, Capacity up to 42 lbs, Easily lifts, tilts, pans, and rotates, Vesa MIS-D/E/F, Portrait/landscape rotation with lockout, Streamlined cable management, WHITE With the HX Wall Monitor Arm, you can reposition large monitors using patented Constant Force™ Technology. It enhances your workspace with a sleek design, and an optional dual or triple monitor bow kit ups your screen count and productivity.