The SA Series Rack Adapter from Radial Engineering is designed to allow you to rack 1 or 2 Radial products in a 1 RU space. It is compatible with their FireFly DI, the JDI Duplex DI, the Gold Digger 4-channel mic selector, the Cherry Picker studio preamp selector, the MC3 monitor controller, the EXTC-SA guitar effects interface, and the Phazer class-A phase adjuster. Included are 2 angle brackets, a center cube attachment for mounting 2 units, a set of mounting screws, and a hex wrench.