Premium Quality PFI706GY High Capacity Gray Ink Cartridge compatible with the Canon IPF8300, 8300S, 8400, 8400S, 9400, 9400S; imagePROGRAF iPF8300, iPF8300S, iPF8400, iPF8400S, iPF9400, iPF9400S. The use of compatible supplies does not void your printer warranty. Product Detail Ninestartechonline.com