Save even more with our 4 pack of professionally remanufactured HP 56 and 57 inkjet cartridges. This set includes 2 HP 56 black cartridges, and 2 HP 57 color cartridges. These LD remanufactured cartridges are original Hewlett Packard C6656AN ink cartridges which have been through one cycle of service and have been recharged. These LD remanufactured ink cartridges have been thoroughly cleaned along with the printhead nozzles. Following the cleaning process, we refilled the cartridge with a professionally manufactured pigment-based ink formula for archival print life and color stability. This ink formula is specially designed to produce vibrant and long-lasting prints comparable to HP. After carefully inspecting the shell for leakage and monitoring the electrical circuitry for efficiency, we put the cartridge through a final print test to be certain it is worth of our 100% money-back guarantee. Our remanufactured ink cartridges are not remanufactured by HP. For use in the following HP Printers Deskjet 5550, PSC 1315, OfficeJet 6110, PSC 1210, Deskjet F4140, PhotoSmart 7760, PhotoSmart 7350, Deskjet 5650, OfficeJet 5510, 4215, Deskjet F4135, PhotoSmart 7960, Deskjet 5150, PSC 1350, PSC 1209, PhotoSmart PSC 2410v, PhotoSmart 7660, PhotoSmart 7550, OfficeJet 4110, PSC 2410, PSC 2175, Deskjet F4185, Deskjet F4180, OfficeJet 5510v, OfficeJet 4215xi, OfficeJet 4215v, Deskjet 9650, PhotoSmart 7450, PhotoSmart 7260, PhotoSmart 7150, OfficeJet 6110xi, Deskjet 5850, PSC 2410xi, PSC 2210, PSC 2110, PSC 1315v, PSC 1315xi, PSC 1210v, PSC 1210xi, PSC 1110, Deskjet 450, PSC 1312, Deskjet F4172, Deskjet F4150, PSC 2210xi, PSC 2210v, PSC 2410v, PSC 1311, OfficeJet 5505, OfficeJet 5510xi, PhotoSmart 7755, Deskjet 9680, Deskjet 9670, PhotoSmart 7960w, PhotoSmart 7760w, PhotoSmart 7760v, PhotoSmart 7660w, PhotoSmart 7660v, PhotoSmart 7450v, PhotoSmart 7260w, 7260v, 5850w, 5650w, and 5150w. We are the exclusive reseller of LD Products brand of high quality printing supplies on Newegg.