Thank you for your question! The HP Envy 6400e is a printer line and not an individual printer. However, the HP Envy 6455e, the currently available printer in that line, uses the HP 67 ink. That ink should be compatible with your printer and can be found at this link: https://www.hp.com/us-en/shop/sitesearch?keyword=67
Answered by: HP Team Grant
Date published: 2024-07-24