This professionally remanufactured HP 78 Tri Color (C6578DN) inkjet cartridge is an original Hewlett Packard (HP) C6578DN ink-jet cartridge which has been through one cycle of service and has been recharged. This HP 78 Tri Color ink cartridge has been thoroughly cleaned along with the printhead nozzles. Then the HP C6578DN/ C6578D was filled with the same ink formulation, the internal back pressure was insured and then it was inspected for any possible shell leakage, tested the operation of all electrical circuitry and finally run through an actual print test. If the C6578 Tri Color inkjet cartridge passes our rigid standards, it has been remanufactured for your Hewlett Packard (HP) printer! This quick-drying, dye-based ink offers optimum performance and productivity with superior resistance to smudging and bleeding.We offer a 100% Quality Satisfaction Guarantee on our Remanufactured C6578DN ink cartridge. For use in the following printers: Deskjet 920,920C,920Cvr,930C,930,932,932C,935C,935,940,940C,950C,950,952,952C,960Cse,960Cxi,960,970,970Cse,970Cxi,970C,990C,990Cse,990cxi,995C,995ck,995,1220cse,1220cxi,3820,6122,6127,9300,990cm,940Cvr,1220c-ps & PSC 750,750xi,950vr,950xi,950 . 4inkjets is the exclusive reseller of LD Products brand of high quality printing supplies on Amazon.