This is an original high capacity Canon CLi-571 grey ink cartridge. Original means this cartridge is brand new & made by Canon. Filled with 11ml Canon's Chroma Life 100 ink the CLi-571 grey cartridge can produce up to 289 pages. This ink is a dye based ink which is best for printing photo's as it sinks into the page to allow all the colours to merge & create super colour reproductions. Changing the cartridge is simple & it won't take long at all. Open the cover of the printer to begin & take out the empty cartridge by squeezing the clip on the side & lifting it out. The new cartridge can then be put in its place, make sure you've removed any tapes & packaging first. Pushing the cartridge down until it clicks in will lock it into place. The CLi-571XL grey cartridge is physically the same size as the regular cartridge it just holds more ink in, so don't worry it will fit in & work the same.