Hewlett Packard`s genuine valuepack of HP 301 black and colour cartridges for the HP Envy 4503 and all other compatible printers, offers a saving over purchasing the cartridges separately. As the Hewlett Packard N9J72AE twinpack contains two standard capacity cartridges it represents the cheapest way of getting your printer up and running with original cartridges.This original multi-pack of HP 301 CH561EE and HP 301 CH562EE cartridges provides a quality pair of standard capacity HP cartridges at an affordable price. These HP 301 cartridges offer 190 pages from the black and 165 pages from the colour. The 301 CH561EE and 301 CH562EE cartridges are compatible with a large number of HP printers.