Speedy Inks - Compatible Canon CLI251XL CLI 251XL CLI-251XL 6452B001 High Yield Gray Ink Cartridge For use in: Pixma iP7220, iP8720, ix6820, MG5420, MG5422, MG5520, MG5522, MG5620, MG6320, MG6420, MG6620, MG7120, MG7520, MX722, MX926 Page Yield: 3350 | Color: Grey Shelf Life: 36 Months The use of aftermarket replacement cartridges and supplies does not void your printer's warranty