This is a new premium compatible MICR Cartridge custom built to replace HP Q1339A 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 factory-tested, ISO approved, and guaranteed to perform with HP LaserJet Printers. We offer an exclusive 30-day customer satisfaction guarantee and 1-Year 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.