Peerless LCT420A Single Arm with Desk Clamp and Grommet for 12-30-Inch Display - Black Two desk assemblies in one box, the desk clamp and grommet are supplied for either desk mounting solution Arm extends 16.4" (417mm) with height adjustment for perfect positioning and ergonomic comfort to help reduce eye, back and neck strain Tilt: +80/-20 Pan/Swivel: 180 Rotate: 360 Portrait or landscape without removing the display Compatible with VESA75 and 100mm