Features: This to oculinks adapter enables seamless installation of U.2/U.3 SFF 8639 hdds into PCIe NVMe NGFFs slots while maintaining full speed performances without signals conversion chips, for PCIe4.0 protocols. Featuring direct signals passthrough from the host interfaces to your hdds, this PCB based converter eliminates bandwidth limitations and preserves NVMe protocols integrity, requiring only SFF 8611 to SFF 8639 cable for complete functionality. for PC builders, data center technicians, and workstation users needing to expand high speed storage capacity through underutilized slots in gaming rigs, servers, or enterprises hardware configurations. Perfect for upgrading NVMe compatible systems requiring U.2 enterprises hdds deployment, particularly in space constrained environments where direct motherboard mounted storage expansion is preferred. Engineered with industrial PCB materials, this adapter ensures stable signals transmission for PCIe4.0 bandwidth (up to 64Gbps) when paired with compatible components, though speed depends on end to end support in host interfaces, hdds, and cabling. Specifications: Materials: PCB Size:8x2cm styles: Front insertion styles, Rear insertion styles(optional) Package Includes: 1PC to oculinks Adapter note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.