Features: brand new and high quality New upgrade, support PCIE 4.0 GEN4, backward for PCIE 3.0 GEN3.NVME four-disk design, stable installation, can run 4 NVME disks at full speed at the same for time. Supports 2U server small chassis installation; built-in multiple sets of high-power for DC modules for sustainable and stable work. Support 4-disk soft for RAID, soft for RAID can be realized under WIN10 system, four-disk consistency is good, for RAID operation is stable. Integrated high-speed signal enhancement technology to ensure the stability and security of big data processing, can be widely used in data acquisition, data mining, for image processing, video Processing, cloud computing and other fields. Thicken board Includes for shell to protect the hard disk from deformation. Specifications: Material: metal Size: approx.17x6.8cm/6.69x2.68in Color: gray Package Includes: 1pc x expansion card note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!