M604/M605/M606 MICR Toner Secure Cartridge Magnetic (MICR) Toner produced by TROY provides a level of quality to meet or exceed the highest printing standards. 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 for check printing.HP only supports MICR products in LaserJet Printers that have been modified to the TROY specification. TROY products are fully supported by HP Service and will NOT void the HP manufacturer's warranty.Printer reliability is guaranteed with MICR toner cartridges produced by TROY. TROY's unique manufacturing and testing process has resulted in a toner which is precision-matched for each unit helping to maintain optimum performance of your laser printer. TROY MICR Toner Secure™ was created as a way to help prevent fraudulent alteration of documents. The patented security agent forces a bright red stain to permeate through the document if chemical alteration is attempted. TROY's patented solution is the first laser toner, which will help to protect the words and graphics you are printing.M604/M605/M606 MICR Toner Secure Cartridge Magnetic (MICR) Toner produced by TROY provides a level of quality to meet or exceed the highest printing standards. 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 for check printing.HP only supports MICR products in LaserJet Printers that have been modified to the TROY specification. TROY products are fully supported by HP Service and will NOT void the HP manufacturer's warranty.Printer reliability is guaranteed with MICR toner cartridges produced by TROY. TROY's unique manufacturing and testing process has resulted in a toner which is precision-matched for each unit helping to maintain optimum performance of your laser printer. TROY MICR Toner Secure™ was created as a way to help prevent fraudulent alteration of documents. The patented security agent forces a bright red stain to permeate through the document if chemical alteration is attempted. TROY's patented solution is the first laser toner, which will help to protect the words and graphics you are printing.