Polaroid C6656AN Replacement Ink Cartridge for HP 56 - Black High performance, guaranteed replacement inkjet cartridge from Polaroid, the leader in digital imaging. Black replacement ink cartridge for HP DeskJet, PhotoSmart, Office Jet, PSC, Digital Copier and Color Copier series machines (see full compatibility below). Approximate yield: 450 pages at 5% page coverage Smart engineering means a perfect fit for your machine while providing the same performance and reliability as original HP supplies. Helps protect our environment by containing recycled components, resulting in over 90% of the original cartridge's non-wearing parts from needlessly clogging landfills.