The Canon ChromaLife CLI521 Cyan Ink Cartridge for Pixma Printers is optimised for photographic print quality when used with Genuine Canon Photo Papers. The cartridge uses F.I.N.E. (Full Photolithographic Inkjet Nozzle Engineering) technology for exceptional sharpness and detail. The Canon CLI-521 is compatible with the Canon Pixma iP4600, iP3600, MP540,