The genuine HP 305 is a standard capacity colour ink cartridge that offers users cheapest way of getting their printer up and running. Designed to keep all compatible machines (like the HP Envy Pro 6400) up and running to the highest standard, the 3YM60AE is a worthy purchase for any lucky owners of these printers.The 100 page yield of the HP 305XL tri-colour ink cartridge makes the cost per page surprisingly low for an original unit. Filled with 2ml total of original cyan, magenta and yellow ink, the Hewlett Packard 3YM60AE is guaranteed to give you the very best from your inkjet printer.