The MICR Lexmark T630, T632, T634 High Yield Print Cartridge, 12A7462 MICR 21,000 Page Yield. Also known as 12A7362 MICR. Replaces also the 12A7460. MICR is an acronym for Magnetic Ink Character Recognition. MICR Cartridges are used for printing checks. Banks read magnetic ink differently than standard ink, which allows them to reliably process checks. Magnetic Ink Recognition Toner; Regular toner mixed with IRON OXIDE particles, recognized by scanning devises. Mainly used for Check printing and bar coding. Built with NEW drums and NEW components that match all ABA standards (American Bankers Association).