All our M series units now available in industry standard 19` rackmount encloses at no extra charge. This will allow our customers to stack multiple generators to achieve desired ozone production. Various sizes of Absolute Ozone generators can be combined to attain precisely required ozone output for your application.. Expensive and large cabinets can be replaced by inexpensive rackmount frame, which can be purchased from any local electrical or network supplier for around $100. You can also use those generators to replace or add to your existing rackmount systems manufactured by other vendors.