This cold-rolled steel SmartRack blanking panel with a black powder-coated finish fills 3U of unused space in your EIA-standard 19" rack. Not only does this give your rack a sleek, clean look, but it also protects your valuable equipment by improving airflow and cooling efficiency. This reduces operating costs, improves performance and provides longer lifespans for your equipment. Two built-in four-inch 12VDC fans mount into the rack and pull cool air from the outside. The included 12V DC power supply features a six-foot cord and NEMA 1-15P plug that connects to an AC wall outlet, PDU or UPS system.