Troy Toner Secure MICR Toner Cartridge - Alternative for HP (CF280A)MICR Toner Secure Cartridge provides a level of quality to meet or exceed the highest printing standards in your Troy MICR 401 and Hewlett Packard LaserJet M401 Printer. 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. Unique manufacturing and testing process results in a toner that is precision matched for each unit helping