SNANSHI M.2 NGFF SSD to 18 pin Blade Adapter Replace Sandisk ADATA XM11 SDSA5JK-128G SD5SE2-128G SDSA5JK-256G SD5SE2-256G for ASUS UX31 UX21 ZenBook You can use this Adapter Card + Standard M.2 SSD Replace Original SSD to Upgrading Higher Capacity SSD Designed for M.2 NGFF B+M Key SATA SSD's only,not support M Key PCIe SSD Support: 22*42 mm / 22*60 mm / 22*80 mm PCB size is same as SSD from Asus UX31 UX21 Zenbook,PCB dimension: 94mm x 24mm (LxW)