Renewable Toner Compatible MICR Toner Cartridge High Yield Replacement HP 27X C4127X for Laserjet 4000 4050 DEPENDABLE CHECK PRINTING. RT MICR Cartridge Replacement for HP 27X / HP C4127X SUPERIOR QUALITY. The RT Compatible HP 27X MICR Cartridge contains high quality magnetic toner that guarantees bank acceptance Replaces OEM #: HP 27X / HP C4127X | High Yield: 10k Pages based on 5% coverage; prints 30k checks @ 3 per page For use in HP LaserJet 4000 4000n 4000t 4000tn 4000se 4050 4050n 4050t 4050tn 4050se printer series LIFETIME WARRANTY: we always honor our warranty, even if the Amazon return window has closed