This is 4-Pack compatible / remanufactured Lexmark C540/ C543/ C544/ C546/ X543/ X544/ X546/ X548 toner cartridges. Includes 1 each C540H1KG (black) C540H1CG (cyan) C540H1MG (magenta) C540H1YG (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.