The Blackmagic Teranex Mini - Rack Shelf is designed to rack Teranex Mini Convertors side by side. You can fit three converters in 1RU, six in 2RU, and nine in 3RU. When multiple units are racked side by side, variable speed fans pull from one unit into the next to facilitate optimal air flow. If a fan fails the adjacent Teranex Minis will increase fan speed to prevent overheating! And because they're small and lightweight, you can even mount them in the rear of a rack or road case!