This is a new compatible MICR Toner Cartridge for HP LaserJet 4100, 4100mfp, 4100dtn, 4100n, 4100tn printers. It is custom built to replace HP C8061X toner cartridges. MTI © MICR Cartridges deliver high-quality MICR output and excellent toner yield, at an exceptionally low cost per page. All our products are all factory-tested and ISO approved, and guaranteed to perform with HP LaserJet Printers. We offer an exclusive 30-day customer satisfaction guarantee and 1-year Manufacturer Warranty. Our dedicated customer care staff is available 9 a.m. to 7 p.m, Monday through Saturday, to answer any questions and provide technical support.