Features: This Two SFF 8639 SSDs to PCIe4.0 8X adapter enables connectivitys between high Performances storage devices and your computer, enhancing data transfer speeds and systems efficiency. from PCB materials, this adapter ensures Performances and longevitys, supporting wide ranges of PCIe4.0 slots for compatibility. for enthusiasts, IT professional, and gamers who require efficient data management solution in their computings setups. for upgrading desktop systems or building PC where fast speed data access and transfer, such as gaming rigs or professional workstations. This adapter for both male and female connectors, making it addition to any computer. Specifications: Materials: PCB Size:164x112mm/6.45x4.4inch Package Includes: 1PC SFF8639 to PCIe 8X 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 picture may not reflect the actual of the item.