The HP LJ 4240 Q5942A 10K Cartridge by Clover Technology is guaranteed to perform at or above your HP LJ 4240 (Q15942A) units. Free shipping on $100.00 plus volume! Each HP LJ 4240 Q5942A 10K Cartridge is perfect for use in all HP LJ 4240 machines and guaranteed for 2 years. This is a fantastic way to cut industry expenses, we save the government over 2 million per year on just one main machine alone! Thank you for supporting U.S. businesses and the environment, together we will both save your office money and keep empty toner cartridges out of the landfills.