The Sonnet DuoModo Dual-Module Rackmount is the perfect complement for Expansion Modules and is perfect for (home) studios that want to rackmount their xMac mini, eGPU or Echo III devices. The rugged 19" steel construction also offers rack rails for use with 16-24" deep racks. Naturally, only one module can be installed with the included blank plate to cover the empty slot. Whether it's an SSD storage dock, graphics card expansion, or Thunderbolt-to-PCIe expansion, with the Sonnet DuoModo Dual-Module Rackmount, YOU decide the combination of devices for your custom rack.