This Canon CLI-42LGY ink cartridge has been produced from scratch to offer compatibility with the Canon Pixma Pro-100 and all other compatible printers. Great care has been taken to ensure that the high quality light grey ink within this compatible CLI42LGY flows freely from the cartridge and offers exceptional print quality.The 13ml of dye based light grey ink within our Canon compatible 6391B001 cartridges has been designed to mimic the colours produced by the genuine article, meaning telling the difference between the two will be a challenge. Whilst our compatible CLI-42LGY ink cartridges do not offer the 200+ years colour fastness protection of the Canon ChromaLife100+ ink, they are ideal for everyday printing in a home or small office environment.