The Canon CLI-571 XL Yellow ink cartridge is a high yield version of the standard CLI-571 cartridge and uses the same ChromaLife100 dye based ink but has a larger capacity ink tank. THis means it is compatible with all of the same printers as the standard version but it hold twice as much ink. If you print a high volume or want to save money and time on replacing cartridges the XL version is the ideal choice as it is the same in every way but for the greater amount of ink.