Humanscale M8 Conversion Kit - M8CB-W Polished Aluminum Color Converts a Single M8 Monitor Arm to a M8 with Crossbar for Two Monitors NEW Humanscale M8 Conversion Kit M8CB-W Converts a Single M8 Monitor Arm to a M8 with crossbar for two monitors Genuine Humanscale product - HumanScale M8 Monitor Arm, Monitors or other items are not included. Select from Silver, Polished Aluminum or Black Colors Full Humanscale Factory Warranty is Included