Features: This M.2 to SFF 8643 adapter enables direct PCIe NVMe drive connection without signal conversion for motherboards. Adapter is used in the motherboards port with M.2 NVME PCIE insertion interfaced to use, the adapter is with SFF 8643 interfaced. This product adapter is generally used when you need to have the specified cable and hard drive in hand: SSF-8643 to SFF-8639 cable, connecting double mode SFF-8639 drive. Use this to insert the SFF-8643 cable in the direction from the direction of the hard disc fixing column, SFF-8643 card holder height is 14mm, please make sure your machine space is enough height! This product supports PCIe4.0 PCIe3.0 protocols and compatibles 2260/2280 M.2 Solid disks. Specifications: Item: M.2 to SFF 8643 Adapter Material: ABS Size: Length 80x22x14mm/3.14x0.86x0.55in Connection: M.2 NVME PCIE drive Interfaced Supports PCIe4.0 PCIe3.0 protocols Package Includes: 1PC M.2 to SFF 8643 Adapter note: Single U3 mode hard drive will not work. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution