Features: brand new and high quality This product only supports 2230 2242 size for M.2 NGFF- interface with PCIE x4 AHCI or NVMe transfer protocol solid state drive (solid state drive has only one for gap) and 2230 2242 size PCIE x2 AHCI or NVMe transfer protocol solid state drive. Note that some solid-state drives have two gaps but the transmission protocol is SATA. This SATA protocol cannot be used. This adapter is only suitable for 2016 2017 macbook- pro A1708 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 Specifications: Item Type: Adapter Card Material: PCB-Board Suitable for : 2016 2017 macbook- pro A1708 model Supports : 2230 2242 Size PCIE SSD Size: Standard Size 63x32x1mm/2.48x1.26x0.04in Color: As Shown Quantity: 1 Pc Type: With Disassembly Tools / Single Card (Optional) Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Does not support the installation of systems lower than version 10.14, because the integrated NVMe driver of the low version system cannot recognize most NVMe SSD. Package includes: 1 x NVMe SSD to A1708 SSD Adapter Card