This is 4-Pack remanufactured Dell 1250c / 1350cnw toner cartridges. Includes 1 each 331-0778 (black), 331-0777 / 331-0780 / 331-0779 (cyan / magenta / yellow). 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.