INK4WORK 6 Pack Compatible Ink Cartridge Replacement for Canon PGI-250XL BK PGI250XL CLI251 XL CLI-251XL to use with Pixma iP8720 MG6320 MG7120 MG7520 ink4work Set of 6 pack Compatible Canon PGI-250 BK XL & CLI-251XL High Capacity Ink Cartridge Combo ISO9001 certified. Not made by canon. Sold by ink4work CLI-251XL Gray Compaible ink cartridge only works with Canon Pixma MG6320 Sereis Printer. You will get 1 x PGI-250XL , 1 x CLI-251XL B & 1 x CLI-251XL C/M/Y/Gray High yield compatible Ink cartridge.