Make the switch to our discount compatible HP DeskJet 840c ink cartridges and get crisp printouts at an affordable price. Our discount ink cartridges have been manufactured using the same technology as the original HP ink cartridges to ensure they will be compatible with all the features of your HP printer. We test all aspects of our ink cartridges for HP DeskJet 840c printers and our products are guaranteed to create high-quality documents and images after a simple installation process. This cartridge includes a 1-Year warranty and 100% satisfaction guarantee.