MICR cartridge contains all original OEM components while utilizing a specially formulated MICR toner developed to meet all U.S. and Canadian banking standards. Cartridge is designed, engineered and manufactured to be compatible with Hewlett-Packard LaserJet 1000, 1200, 1200n, 1200se, 1220, 1220se, 3300mfp, 3310, 3320mfp, 3320n mfp, 3330mfp and 3380 for superior performance.