Renewable Toner Compatible Toner Cartridge Replacement for HP 11X ( Black ) DEPENDABLE CHECK PRINTING. RT MICR Cartridge Replacement for HP 11X / HP Q6511X SUPERIOR QUALITY. The RT Compatible HP 11X MICR Cartridge contains high quality magnetic toner that guarantees bank acceptance OEM #: HP 11X / HP Q6511X | Yield 12k standard page; prints 36k checks @ 3 per page For use in HP LaserJet Printers: 2420, 2420d, 2420dn, 2430, 2430n, 2430t, 2430tn, 2430dtn LIFETIME WARRANTY: we always honor warranty, even if the Amazon return window has closed