Office Depot(R) Model 56 (C6656A) Remanufactured Black Ink Cartridge Compatible with select HP, Deskjet, Officejet, and Photosmart models. Comparable to the HP 56 cartridge. Backed by 100% No-Risk Quality Guarantee to perform to your complete satisfaction. Yields up to 450 pages. Greener choice  they require less energy to produce and help prevent waste in landfills.