Goliton? M.2 NGFF SSD to ASUS UX31 UX21 Notebook 6+12 pin Adapter with an Interface M.2 NGFF SSD Use this adapter you can convert M.2 NGFF Interface SSD ASUS UX31 UX21 notebook SSD Interface. Board has four mounting holes, respectively 22 * 30 mm, 42 mm 22 * 22 * 22 * 60 mm 80 mm of SSD. M.2 NGFF Interface points B KEY and MKEY two interfaces defined in this paragraph adapter only supports B KEY interface definitions.