This is a Western Digital WD_BLACK 1TB SN850X NVME M.2 2280 SSD that is brand new and sealed. This is a very high performance PCIE 4.0 x4 NVME SSD that can deliver up to 7300 MBps sequential read speeds.

Noteworthy Specs include:

• M.2 2280 Form Factor
• PCIE 4.0 x4 Interface
• Up to 7300 MBps sequential read
• Up to 6300 Mbps sequential write
• Up to 800,000 read IOPS
• Up to 1,100,000 write IOPS

Additional information including full specifications can be found at the manufacturer's data sheet at https://documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/internal-drives/wd-black-ssd/data-sheet-wd-black-sn850x-nvme-ssd.pdf