This desk mount has two dynamic arms attached to a small post. Each arm has smooth fingertip horizontal and vertical movement, plus tilt, pan, and rotation of monitors landscape-to-portrait. The monitor arms are spring-assisted and can be installed in any of the four post channels, and additional monitor arms can be added later. The spring-assisted arm design provides excellent ergonomic support and display adjustment from a seated position. Perfect for activity based workplaces, sit-to-stand workstations, and shared environments. AWM-ADTC-W: Atdec AWM-ADTC Dynamic Monitor Arm with Channel Clamp. Up to 38" screens. Max Load 8kg. VESA up to 100x100. White. 10 YR WTY AWM-P13-W: Atdec 135mm Short Post White AC-GC-S: Atdec Grommet Clamp Silver