Attoner Compatible Toner Cartridge Replacement for HP 42X(Q5942X)(Black), for Use In HP LaserJet 4240/4240N/4250/4250DTN/4250N/4250TN4350/4350DN/4350N/4350TN/4350DTNSL Printers Color:Black Estimated print yield of 1800 pages* per black cartridge Compatible Printer List: HP LaserJet 4240/4240N/4250/4250DTN/4250N/4250TN4350/4350DN/4350N/4350TN/4350DTNSL(Please Notes: The Toner Cartridge Only compatible with the version of the device before May 2016) New condition and are friendly to the environment. We save you money while helping the environment. Print true-to-life photos and laser-quality text, help your pages look clear, legible, and cleanly professional-looking