Replacement for Lexmark/IBM 75P6961 - Compatible Black MICR Toner Cartridge (21000 Yield) for INFOPRINT 1532, 1552, 1572. 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). The MICR IBM 75P6960 High Yield Toner Cartridge for InfoPrint 1532/1552/1572 Series Printers 21,000 Page Yield is also known as 75P6961 MICR. Replaces 75P6958 & 75P6959 MICR's.