Specifications: Fit for Lenovo X1 Carbon Ultrabook to replace the following SSD by higher capacity M.2 NGFF SSD: Sandisk 45N8296/45N8297, SD5SG2 45N8298/45N8299 (Lenovo P/N NO) 128GB 256GB SSD, 45N8327 SSD SFF 128 GB Toshiba THNSNS128GMGP/45N8300 /45N8301?;128GB; 45N8303 SSD SFF 256 GB, 45N8305 SSD SFF 180 GB Cherr Crest Intel 45N8422/45N8423(Lenovo P/N NO) 240GB FDE Cherry Crest SSD;45N8421 SSD SFF 120GB Cherry The size is same as an SSD from Asus UX31 UX21 Zenbook. Plug and play, no additional drivers are needed. Supports 2 sizes : Type 2230, 2242 Dimensions: 70 x 23 mm (L XW) Package included: 1 x M.2 NGFF SSD to 26 Pin Adapter for Lenovo X1 Carbon Ultrabook(SSD is not included)