Sintech NGFF M.2 18Pin Adapter Card for Upgrade Sandisk SD5se2/SDSA5JK ADATA XM11 SSD From Asus Zenbook UX31 UX21 Alow NGFF SATA SSD to replace18pin SSD of Asus Zenbook UX31 UX21 Designed for M.2 NGFF B+M Key SATA SSD's only,not support M Key PCIe SSD Support 4sizes NGFF M.2 Socket SSD: type 2230, type 2242,type 2260,type 2280 Replace SSD:Sandisk SDSA5JK-256G SDSA5JK-128G SDSA5JK-064G ,ADATA XM11-256GB XM11-128GB PCB size is same as SSD from Asus UX31 UX21 Zenbook,PCB dimension: 94mm x 24mm (LxW)