AxcessAbles RKSHLFVT2UF 2U Two Space Rack Component Shelf Vented Bottom (Full Depth) Rack shelves are required for A/V or computer components that do not have rack mount ears or are not wide enough for standard rack mount systems. The AxcessAbles rack mount shelves are sturdy steel construction with a durable powder coat surface finish. The vented bottom assists maximum airflow to help keep components running cool. The Full Depth shelf measures 18" deep and features a lip at the front and rear to keep your valuable components in place. It also features tapering side walls for component access and to allow more airflow around components. This high capacity shelf works great for oversize components.