This is a compatible HP CB436A - Black MICR Toner Cartridge (2000 Yield). 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). CB436A MICR - HP P1505 P1505n MICR Toner - Print your own checks with our HP compatible P1505n MICR Toner. This P1505 MICR Toner Cartridge is a Black toner used in MICR check printing. For use in HP LaserJet P1505 P1505N M1522 M1522N M1522NF M1120 M1120N 1505 1522 Troy 1505 MICR printers. Compatible with MICR Cartridges: CB436A CB436X THN-36A 02-81400-001.