The genuine black HP21 ink cartridge is the dependable and cost-effect choice. The C9351AE cartridge produces crisp text and graphic in excellent detail. The formulation of the HP21 ink cartridge means that your prints will last for years without fading. On plain paper, the ink adheres perfectly which means that bleeding and smudging is minimised. The C9351AE produces excellent text and detailed graphics. Use HP21 on speciality papers The HP21 black ink cartridge can be used on a variety of speciality papers, such as glossy sheets and special media, so gives you the flexibility to print out your items to fit your personal requirements. HP21 cartridge is versatile The HP C9351AE ink unit is perfect for students with regular projects, the regular home user, or small office. Each HP21 cartridge produces up to 190 pages of top-quality print. Recycling your HP21 cartridge HP is big on helping the environment and has a completely free recycling process. Details are included with every pack. No Original HP cartridge is ever sent to landfill. Specifications Colour: Black Ink drop: 17pl Page yield: 190 pages Pack size: Single Compatibility Specific HP Printers (Desk Jet