Toner Refill Store carries only the highest quality Premium Compatible and remanufactured inkjet cartridges. The HP Deskjet 840C inkjet cartridges from Toner Refill Store is 100% guaranteed to meet or exceed your expections and surpass the print quality of the OEM (Original Equipment Manufacturer) HP Deskjet 840C inkjet cartridges. Many HP Inkjet Printers carry a black and a color inkjet cartridge. Toner Refill Store carries the black, cyan, magenta, yellow, and tricolor inkjet cartridges. The use of our premium compatible and remanufactured inkjet cartridges for the HP Deskjet 840C does not void your printer's warranty. Our HP Deskjet 840C high yield inkjet cartridges have a 'One Year 100% Satisfaction Guarantee'. We also carry the OEM Inkjet Cartridges for your printer.