The GENUINE HP 21 Black Ink Cartridge is a high-quality product designed for HP printers, such as DeskJet D1300, D1400, and C935. This black ink cartridge is an original HP product, ensuring compatibility and optimal performance. With inkjet print technology, this unit provides crisp and professional-quality black prints. Ideal for home or office use, this cartridge is a reliable and efficient choice for your printing needs. Box has marking of 12/09 - sold as-is.