Features: brand new and high quality This for M.2 NVME SSD adapter card is only suitable for 2016 2017 mac-book pro A1708 13" MBook model. Only Supports 2230/2242 type Key-M NVME for M.2 SSD, does not supports SATA bus for key B/B+M SSD No soft driver required, no additional power required This product only supports 2230 2242 size for M.2 NGF interface with Pcie x4 Ahci or Nvme transfer protocol solid state drive (solid state drive has only one gap-) and 2230 2242 size Pcie x2 AHCI or NVMe transfer protocol solid state drive (such solid state drive There are two interfaces, but the transmission protocol is NVMe or AHCI. Note that some solid-state drives have two gaps but the transmission protocol is SATA. This SATA protocol cannot be used. Specifications: Item：A1708 SSD Adapter Card Size: approx 61x29mm/2.4x1.14in Material: ABS Color: Black Package Includes: 1 x A1708 SSD Adapter Card note: This adapter only supports the installation of OS- Mojave, Catalina , and does not support the installation of systems lower than version10,14, because the integrated NVMe driver of the low version system cannot recognize most NVMe SSD. Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.