2 NVMe PCIe 3.0×4 SSD drive. 100% tested and guaranteed to work. 512GB: Western Digital part number is SDDPTQD-512G. 1TB: Western Digital part number is SDDPTQD-1T00. 2TB: Western Digital part number is SDDPTQD-2T00. Free 2230 to 2280/other lengths adapter is included to help re-use your old drives or adapt this SSD into a 2280 slot. DOES NOT WORK in Surface Pro 8 or 9. Surface Laptop 3 & 4. Any Dell/HP/Lenovo laptops that use 2230 PCIe NVMe drives (message us with your SSD model if you’re unsure). Max Usage Details from Crystaldiskinfo. Interface – PCIe Gen 4.0 x4. Size – 2230 (22x30mm). Sequential Read Performance = Up to 5000 MB/s. Sequential Write Performance = Up to 4000 MB/s. Sequential Read Performance = Up to 5150 MB/s. Sequential Write Performance = Up to 4900 MB/s. Sequential Write Performance = Up to 4850 MB/s. These are for NVMe PCIe M. These are NOT compatible in all machines!! Please double check that your machine has a compatible NVMe M. It is your responsibility to ensure this works with your system. Don’t hesitate to ask if you have any questions. To qualify for a free return all items must be in unused condition. New items must be unused and in new (sealed if applicable). Used items must be unused as well. SSDs have no additional data written.