High-Quality MICR Toner Cartridge for Lexmark 520T/522T Printers. MICR Toner produced by TROY provides a level of quality to meet or exceed the highest printing standards. Produced within TROY’s ISO 9001:2000 certified facility, our MICR toner cartridges are precision-matched to meet the print characteristics of each printer model. Produced by TROY with the tightest tolerances, these MICR toner cartridges consistently meet or exceed the yield of OEM cartridges, providing customers with a low operating cost.