This is 4-Pack remanufactured/compatible Ricoh MP C3503 toner cartridges. Includes 1 each 841813 (black) 841816 (cyan) 841815 (magenta) 841814 (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.