U.2 SFF-8639 parsed PCI-E X4 support U.2 NVME SSD Slow running, stable output Hollow out design, strong heat dissipation, stable operation for a long time, and can work under a wide temperature PCI-E interface is compatible with the motherboard of X4 / X8 / x16 card slot High speed fast creation is faster and more stable. Equipped with pcie3.0 X4 interface gen3 speed, you can give full play to the speed of U.2 hard disk, so that you can enjoy the speed of reading and writing transmission and experience 4000mb Note:The color and shape of accessories vary randomly from batch to batch ,the appearance and color are random, don't accept the specified and not affect the use Colour:Photo Color Material:ABS Package Contents: 1 x PCIE-U.2x8 dual-disk adapter card 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.