1. The fifth generation FFC flat cable design full coverage shield, soft and , ultra-thin thickness of only 0.5mm. 2. the use of 1.5mm aluminum alloy gasket reinforcement, to broken and dropped line problems, , can effectively block interference and noise. 3. connected with 12V power supply, send SATA power adapter cable. 4. Add 0.8mm fixed plate to prevent PCB deformation and bending, which can extend the service life of PCB board and save hardware replacement cost. 5. Four-layer PCB board, gold finger fully gold-plated, good electrical conductivity, can reduce the oxidation rust impedance caused by the blue screen of death problem. Four-layer PCB board, advanced design, exquisite technology, signal stability and fast, wiring excellent, good isolation. U.2 SFF8639 connector. Product model:F47SF Product name:M.2 NVMe to U.2 SFF8639 Extension cable Wire length:25cm Speed bandwidth:PCIe 4.0 x4 (64G/), backward compatible with gen3 NOTE: Purchase restrictions: Only for professional engineers to specify the purchase, not suitable for ordinary use can not be used, ordinary do not buy. Wire length description: The length of the wire in our shop refers to the part of the visual wire, excluding PCB and connector. Can the F47SF achieve 4.0? This product can reach 4.0, but there is no actual measurement, do not take a shot, using PCIe4.0 U.2 hard disk to achieve PCIe4.0 transmission. Is the F47SF wire removable? The two ends of FFC line can be split, and the convenience is highlighted. In order to avoid insertion loss, FFC wire is only allowed to disassemble 10 times. Note:due to different production batches, the printing screen printing/appearance is different, which does not affect the use. Colour:Black Material:PCB+aluminium alloy Package Contents: 1 * M.2 NVMe to U.2 SSD Extension Cable 1 * SATA power adapter cable 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.