AxcessAbles RKSHLFVT1UM Single Space Rack Component Shelf Vented Bottom (Medium 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 Medium Depth shelf measures 11.5" deep and features a lip at the front and rear to keep your valuable components in place.