Toner cartridge with new MICR toner is designed for use with Lexmark MS810n, MS810dn, MS810de, MS810dtn, Ms811n, MS811dn, MS811dtn, MS812dn, MJS812de and MS812dtn. Cartridge contains magnetic image character-recognition ink for security purposes in printing checks. It must be used with the MICRIMA521 imaging unit. Cartridge yields approximately 6,000 pages.