Compatible Ink Cartridge Replacement for HP 56 HP 57 C6656AN C6657AN (1 Black 1 Color) 2 Pack Alternative to OEM, comes with ONE YEAR WARRANTY from the date of purchase against manufacturer defects. Page Yield: Black 450 Color 391 pages at 5% coverage on Letter/A4 paper. This replacement Inkjet cartridge is built to ISO9001 and ISO14001 Factory Standards. Compatible with HP Deskjet 3550 5550 5652 9650 9680 Officejet 4110 5510 6100 6110