The ECM-RACEWY3 from Atlas Sound is intended to house up to three ECM-20/M modules, so that you can get three separate 20A, AC legs for distributing up to 60A of power to compatible rackmount gear. This housing can be mounted in most racks that provide at least 30" of internal height. You'll find breakaway mounting tabs that make mounting the unit an easy, convenient affair. Should you not need all three modules, two blank panels are included.