buy Original Ink Cartridge HP 21 Black . The original HP ink cartridge model C9351AE, known as HP 21, is a consumable designed to deliver high-quality black ink printing for a wide range of HP printers such as the DeskJet 3910, 3920, 3930, 3940 series, OfficeJet 4315, 4355, J3680, and DeskJet F380, F2180, F2187, F2280, and F2290. This original HP cartridge ensures full compatibility and reliable performance by using black ink specific to these models, guaranteeing sharp results and clear text on every printed page. With a 5 ml capacity of black ink, it provides a balanced volume for home or office printing with adequate coverage, maintaining consistent quality and preventing common issues like clogs or premature drying. Its original nature certifies it is manufactured under HP’s quality standards, offering uniform output without affecting the equipment’s lifespan. This cartridge is ideal for users who value reliability and quality in every print, also facilitating easy installation and handling thanks to its design tailored for the indicated models. In short, the original HP 21 represents a reliable solution to maintain productivity and quality in monochrome printing within the HP ecosystem. Type: CartridgeOriginal Ink CartridgeOriginalColour: BlackCompatible: HPCharacteristics: OriginalTechnology: InkjetCapacity: 190 Pages