MICR Toner Secure Cartridge provides a level of quality to meet or exceed the highest printing standards in your Troy MICR 4100 and Hewlett-Packard LaserJet 4100. 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 to maintain optimum performance of your laser printer. Produced with the tightest tolerances, this cartridge consistently meets or exceeds the yield of OEM cartridges for a low operating cost. High-yield cartridge yields approximately 10,000 pages with 5 percent coverage.