1.This NVME SSD Convert Adapter is DIY kit for assembling a upgraded SSD replacement for with large capacity NVME SSD 2.It is compatible with Air 11 inch A1465 and Air 13 inch A1466 (Mid 2013-2017), Pro (Retina) 13 inch A1502 and 15 inch A1398 (Late 2013 - Mid 2015), Pro ME253 MD878 3.Require macOS 10.13 High or Later; don't compatible with earlier than OS 10.13 versions. Please use your original SSD to upgrades your macOS before installation 4.Support M.2 NVME/AHCI SSD such as 960 , 970 /PRO, , Crucial P1, EX920, for SX8200, 600p series NVME SSD and so on 5.Used to upgrade your storage capacity, perfect for tech enthusiasts, high-end gamers, 4K and 3D content designers Size: 22 x 13 x 3mm Color: Main color black Material: PC board + metal Package Contents: 20 x M.2 Key A to Key M adapter 20 x Screw 20 x screw driver Only the above package content, other products are not included. Note: Light 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.