Star Tech. com 1U Brush Strip Horizontal Server Rack Cable Management Panel Improve the efficiency of your cooling system by covering unused rack space. The CMBRUSH1U Brush Strip Cable Management Panel mounts to a standard 19\" 2 or 4-post rack to organize cables while keeping dust and dirt out of the rack. Constructed of high-quality steel with high-density nylon bristles, the 1U brush plate creates a clean looking point of entry and offers cable separation for simple cable organization