This is 4-Pack remanufactured/compatible Lexmark CS510 toner cartridges. Includes 1 each 70C1XK0 (black), 70C1XC0 (cyan), 70C1XM0 (magenta), 70C1XY0 (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.