Features: Brand new and high quality New upgrade, supports PCIE 4.0 GEN4, backward compatible with PCIE 3.0 GEN3. NVMe quad-disk design, stable installation, can run 4 NVMe disks at full speed simultaneously. Supports 2U server small chassis installation; built-in multiple sets of high-power DC modules for durable and stable work. Supports 4-disk software RAID, software RAID can be realized under WIN10 system, quad-disk consistency is good, RAID operation is stable. Integrated JEYI high-speed signal amplification technology to ensure the stability and security of big data processing, can be widely used in data acquisition, data mining, image processing, video processing, cloud computing, and other fields. Thicker board includes a shell to protect the hard drive from deformation. Specifications: Material: metal Size: approx. 17x6.8cm/6.69x2.68in Color: gray Note: No retail package. Please allow 0-1cm error due to manual measurement. please make sure you do not mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 pc x Expansion Card