Ergotron HX Desk Monitor Arm - Mounting kit (articulating arm, desk clamp mount, grommet mount, pivot, mounting hardware, extension part) for Monitor - white - screen size: up to 42" - desktop :
Ergotron 45-647-216 HX Desk Monitor Arm with HD Pivot - White | Wex Photo Video
Ergotron HX - Mounting component (pivot) for LCD display (heavy-duty) - white - screen size: up to 49" - for Ergotron HX Desk Monitor Arm, HX Wall Mount Monitor Arm - Hunt Office UK