MICR toner cartridge for EPW-WX type printers is designed for use with Hewlett-Packard LaserJet 5Si, 5SiMX, 5SiNX, 5Si Mopier, Mopier 240, 8000, 8000N and 8000DN. Cartridge contains magnetic image character-recognition ink for security purposes in printing checks. Cartridge is estimated to yield 15,000 pages at 5 percent coverage.