4 mm Internal Interface: M. 2 NVME 10Gbps/M. 2 NGFF 5Gbps External Interface: Type C 3.1 Gen2, 10Gpbs Supporting Hard Drive:2230/2242/2260/2280 Case Material: Aluminum Alloy M. 2 SSD to USB 3.1 Type-C Converter Adapter Enclosure Case Solid State Hard Disk Box Features: 1.