1, This adapter card converts motherboard M.2 Mkey(nvme) port to oculink SFF-8612 female port, PCIE X4 4.0/3.0. 2, Connect U.2 U.3 SSD via oculink SFF 8611 to SFF 8639 cable. 3, Gold finger immersion gold process, using high-density low-impedance circuit board. 4, Using M.2 M-key port and NVME PCIE standard. 5, This product needs to be inserted into the PCle x4NVMe M.2 NGFF SSD interface of your computer to be used! The PCle x2 and protocol M.2 interfaces cannot be used! Different batches may have different appearances, which not affect the use; different light or display may cause color difference in the actual product the colors of the screwdriver and screw are random,don't accept the specified color Colour:Black Material:PCB Package Contents: 6x Adapter card 6x screwdriver 6x screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.