Note: The color of the item may vary slightly due to photography and your own computerFeatures:The adapter is not compatible for any Apple brand laptops, designs only for Asus ZenBookThe adapter that install NGFF SSD can replace SDSA5JK-128G SDSA5JK-256G SD5SE2-128G SD5SE2-256G Adata XM11-128G XM11-256G UMM-128M3B UMM-256M3B UMT-128M3B UMT-256M3B for Asus UX21E UX21A UX31 UX31E TAICHI21 TAICHI31 ZenBook SSD.The adapter supports only 4 sizes of NGFF SSD (2230/2242/2260/2280mm). The adapter supports only SATA transfer mode SDD(KEY B), it can not support PCI-E 2X transfer mode SSD(Socket 2 B+M key) and PCI-E 4X transfer mode SSD( socket3 B+M key).The transmission speed and other properties are not changed after installing this adapter and NGFF SSD.You can properly install the O/S on Asus UX21 UX31 ZenBook.No drivers needed for this adapter.About M.2 NGFF SSD interface type and brand:1. Socket 2(B key) SATA transfer mode SSD (such as THNSNH128G8NT/ THNSNH128GDNT/MZNTD256HAGM2. Socket 2(B key) PCI-E 2X transfer mode SSD (such as PX-AG128M6E/PX-AG256M6E/PX-AG512M6E/SD6PP4M 3. Socket 3(M key) PCI-E 4X transfer mode (such as MZHPU128HCGM /MZHPU256HCGL/ MZHPU512HCGL Specification:Material:PCB Board and MetalColor:BlackDimension:95 x 25mm/3.74 x 0.98 inch(L x W)Weight:11gPackage Include:1 x M.2 (NGFF) SSD to 18 Pin SSD Adapter for Asus UX31 UX21 Zenbook 1 x Wrench2 x Screws