This is 4-Pack compatible / remanufactured toner cartridges. Includes 1 each CLT-K504S (black) CLT-C504S / CLT-M504S / CLT-Y504S (cyan / yellow / magenta). 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 monebut also provide a high quality product to ensure long term customer satisfaction.