Specification: Type: PCI-E Riser Model Number: Riser Card Product size: About 80x22x20mm/3.15x0.86x0.78in Applicable: M.2NVME protocol Expansion interface: SFF-8643 Weight: 10g Can be used with: PH49-M2+PH41-1U, can support PCIE slot Support PCI-E4.0 Compatible with PCI-E3.0, the highest theoretical transfer rate is 64GT/s Stable performance, strong compatibility, high-speed lossless transmission Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Riser Card 1 x Baffle 1.High-Speed Transfer: The PH49-M2 riser card adapter uses a PCIe X4 interface that supports up to 32Gbps of data transfer speed, providing fast and efficient data transfer and faster read/write speeds. 2.Multiple Interface Support: This M.2 NVME to U.2 riser card supports multiple interface types, including SFF8643 and SFF8639, allowing for quick and easy connection and adaptation of M.2 solid-state drives to servers or computers, improving data storage and transfer efficiency. 3.Stable and Reliable: The M.2 NGFF PCIeX4 to SFF8643/SFF8639 converter card is made of high-quality materials and has stable and reliable performance, ensuring uninterrupted data transfer and avoiding other problems. 4.Easy to Use: This M.2 Mkey PCIeX4 to SFF8643 expansion card is easy to use, simply insert the M.2 NGFF Mkey solid-state drive into the adapter slot, then plug the adapter into the SFF8643 or SFF8639 interface to quickly achieve data transfer and storage.