Renewable Toner Compatible MICR Toner Cartridge High Yield Replacement for HP 42X Q5942X for use in Laserjet 4250 4350 DEPENDABLE CHECK PRINTING. The RT 42X Q5942X high yield MICR toner cartridge is manufactured with high quality magnetic toner to guarantee bank acceptance. REPLACES OEM #: HP 42X HP Q5942X | HP 42A HP Q5942A HIGH YIELD: 20k standard pages; prints 60k checks @ 3 per page FOR USE IN: HP LaserJet Enterprise 4250 4250n 4250tn 4250dtn 4250dtnsl 4350 4350n 4350tn 4350dtn 4350dtnsl printer series LIFETIME WARRANTY: we always honor warranty, even if the Amazon return window has closed.