This is 4-Pack compatible Okidata C9600 toner cartridges. Includes 1 each 42918904 (black), 42918903 (cyan), 42918902 (magenta), 42918901 (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 monebut also provide a high quality product to ensure long term customer satisfaction.