This is 4-Pack compatible / remanufactured Brother TN770 toner cartridges. Each toner cartridge is manufactured to be comparative to the original in terms of quality and page yield. Extensive testing and R&D have enabled us to produce cartridges that will not only save you money, but also provide a high quality product to ensure long term customer satisfaction. NEW CHIP included which means this cartridge will be recognized as full - just unseal the cartridge and insert it to your printer and you're ready to go!