PGI-5BK Twin Pack contains two PGI-5BK Black Ink Cartridges. The specially formulated PGI-5 Pigment ink produces crisp, smudge-resistant text for professional quality documents. Canon\'s proprietary FINE (Full Photolithographic Inkjet Nozzle Engineering) technology delivers exceptional sharpness and detail. When printing with genuine Canon inks and photo papers the ChromaLife100 system produces beautiful, long-lasting photos. Plus, these individual ink tanks can help reduce waste and save you money by only replacing the colour that runs out.