The Apple Mac Mini Rack Shelf is an ideal solution to create a mac mini power rack. In less than 1U you can rack mount up to 4 mac minis in a standard 19" server rack shelf or any standard equipment rack. The sliding rack mount shelf works with standard mounting depth server racks that have square holes. The design of the 1U Rack Mount Shelf allows airflow from the front of the rack to exhaust directly to the rear of the rack shelf without trapping them in hot air.