This is the Canon CLI-571 XL black ink cartridge. It is an even larger capacity version of the standard CLI-571 black but is filled with 11 ml of Canon’s ChromaLife 100 system black ink. The increased capacity makes this a great money saving option as it will print twice as much as the standard sized printer cartridge but does not cost twice as much. When used with a PIXMA MG7700 series printer this XL ink tank will print up to 895 10x15cm colour photos. This total will vary depending on the model of printer the CLI-571 XL is used with and so should only be considered a guideline estimate.