This Original HP ink gets you crisp, clear results. Original HP ink is designed together with your HP printer to give you an optimized printing system. Help reduce downtime & improve productivity with hassle-free printing. You can have the choice to achieve professional results for a low cost per copy & save on frequent printing using high-capacity ink cartridges. HP Original ink can also create accurate lines, vivid color, as well as neutral grays. Device Types: Inkjet Printer; Color(s): Light Gray; Photo Black; Supply Type: Printhead; Market Indicator (Cartridge Number): HP 91.