Canon Original Ink Combo Pack Black 520 & Black 521, Cyan 521, Magenta 521 and Yellow 521 Approximate 520 Black cartridge yield 324 pages based on 5% coverage and approximate 521 Black, Cyan, Magneta and Yellow cartridge yield 535 pages based on 5% coverage Compatible with the following printers: Canon PIXMA IP4600 and MP550 Printers What's in the box 1 x Canon Ink Combo Pack Black PGI520 520 C M Y CLI521 (OEM)