Toner cartridge with new MICR toner is designed for use with Lexmark MS321, MS421, MS521, MS621, MS622, MX321, MX421, MX521, MX522 and MX622. Cartridge contains magnetic image character-recognition ink for security purposes in printing checks. It uses special MICR toner developed and tested specifically for each model printer, retaining the original components and keeping the OEM factory seal intact. Cartridge yields approximately 6,000 pages.