MICR toner cartridge is designed for use with HP LaserJet 9000, 9040, M9040 MFP, and 9050 Series Printers. Cartridge contains magnetic image character-recognition ink for security purposes in printing checks. Each maximum output cartridge is estimated to yield 30,000 pages at 5 percent coverage.MICR toner cartridge is designed for use with HP LaserJet 9000, 9040, M9040 MFP, and 9050 Series Printers. Cartridge contains magnetic image character-recognition ink for security purposes in printing checks. Each maximum output cartridge is estimated to yield 30,000 pages at 5 percent coverage.