(Does not work in the HP M601 model. Use the lower yield micr version # CE390A) This brand costs more for a reason - Do not take chances on your MICR printing! TROY is the largest desktop MICR toner manufacturer in the USA and precision-manufacturers the highest quality MICR toner available for a wide variety of laser printers. TROY uniquely formulates the toner and designs a MICR font for each specific printer model, in order to meet the exacting specifications required to pass bank requirements. Through their technical expertise, and constant testing and, TROY provides the highest level of MICR quality available --consistently achieving the highest reader/sorter success rate in the industry with a reject rate of less than half the industry norm.