Containing twice as much ink inside the cartridge the HP 364XL (CN684EE) is a high capacity black alternative to a HP CB316EE ink cartridge. This increased capacity not only means the CN684EE black ink cartridge lasts you longer but reduces the running costs of all of the printers listed above including the ever popular HP Officejet 4610 All-in-one. This cartridge was previously known as the CB321EE but this particular cartridge has been discontinued by HP.With 12ml of high quality HP 364XL Hewlett Packard black ink, the results when using this cartridge are fade, water and smudge resistant. Images and text produced with an original CN684EE cartridge are not just hard-wearing, but of the highest possible print quality and the colours completely unrivalled across all alternative third party cartridges.Along with all the benefits listed above you also get the added bonuses of free UK delivery and a low (VAT inclusive) price when shopping with us here at Refresh Cartridges.