M.2 M-KEY PCIE 4.0 GEN4, 64Gbps speed, 8GB/s bidirectional bandwidth. Uses silver-plated shielded cable, double-layer ribbon cable, 2mm thickness, 13mm width. Uses 50,000-cycle M.2 vertical female connector. Supports PCIE 4.0, backward compatible with PCIE 3.0. Gold-plated gold fingers, high-density low-impedance circuit board. The cable is flexible and foldable, suitable for installation in small spaces. Supports NVMe SSDs, does not support . M.2 male PCB, 0.8mm thick, cuttable, impedance controlled to 85Ω. Wire length description: The length of the cables in our store refers only to the part of the cables and does not include PCBS and connectors. Size:40cm Color:As Shown Material:PCB+Plastic Package Contents: 1 * M.2 M-EKY High-Speed Extension 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.