Lexmark have manufactured your printer, so it only makes sense to use genuine 51B0XA0 extra high capacity cartridges in it if at all possible. By using original Lexmark 51B0XA0 toner cartridges the MS and MX series of laser printers will give you the best results possible from the hardware.Brand new Lexmark 51B0XA0 toner cartridges have no sign of degradation to print quality and are filled with uniquely formulated black toner powder too. With an estimated 20,000 prints at a reasonable asking price, the original Lexmark 51B0XA0 toner cartridge is certainly worth considering.