Material: aluminum alloy Size: 115.5*38.3*13.8mm Weight: 83.6g. Support hard disk: support SSD with SATA protocol B Key/B+M Key interface Maximum supported capacity: 4TB hard disk Theoretical transmission rate: 6Gbps CrucialMicron P5 series hard drives, Asgard M.2NVMe SSD, Guangwei M.2 NVMe SSD are not supported