Features: brand new and high quality Four-bay SSD Front and rear PCI-E X16 to for M.2 NVME for matrix card. Please make sure that the PCIe x16 slot of your motherboard supports PCIe signal splitting into 4 PCIe x4. If it cannot support it, please do not buy it! Please consult your motherboard's official customer service for details. If you want to group raid, be sure to use 4 hard drives with the same specifications and models to ensure the consistency of hard drive performance. It only supports M.2 NGFF SSD of 2230 2242 2260 2280 size NVME protocol or AHCI protocol. Please note that AHCI protocol is not equal to SATA protocol. Whether 4 hard disks can form a RAID is related to your motherboard and its own technology. Specifications: Product Name: PCI-E to for M.2 Quad-Disk Adapter Card Card slot interface: X16 Support hard disk: for M for key hard disk Color: black Size: approx. 165x86x10mm/6.50x3.39x0.39in Note: There may be a little size error in manual measurement. Due to different lighting effects and monitor settings, the color of the actual item may not exactly reflect the color in the images. Package includes: 1 x PCI-E X16 to 4 Port M.2 adapter card