The Sanus Systems CASBP3 is a blank panel that is designed to maintain consistent airflow to prevent improper cooling or heating of AV components inside a rack. Use this panel to cover unsightly open space in your rack and protect your equipment from dust and other foreign debris. This panel is constructed of steel with flat edges and features a black powder-coated finish. It occupies 3U of rack space. It is easy to assemble and all hardware is included to complete the task.