Support hard disk: hard disk that supports Nvme protocol Support: M.2 Nvme System: forMac os //Linux Speed: PCIE 4.0 Compatible: 2230/2242/2260/2280 Colour:black Material:PCB note:Screwdriver and screws in random colors, don't accept the specified color There may be differences in printing/appearance due to different batches, which not affect the use; there may be color differences in the actual product due to different lighting or monitors. Package Contents: 4 x Expansion card 4 x Track rod 4 x Screwdriver 8 x Screws 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.