Sonnet MR-MPM-X3HD Mobile Rack Device Mounting Kit, Mac Pro Migration Edition, Storage Drive cage, Black Enables installation of mobile rack devices in the Echo Express III-R and xMac Pro server - supports either one full-height or two half-height devices inside the rack mount enclosure Integrated 100 W power supply - plenty of power for installed devices Eight power connectors - matching connector for nearly every device Large, quiet fan - 80 mm fan provides good airflow over the devices to cool them Includes Tempo SATA Pro 6Gb card (SATA card requires available PCIe slot