Anyone that prints lots of photos or school projects with pictures and graphs on them knows just how quickly some colour ink cartridges run out. These HP No. 301 XL colour ink cartridges are not only paired up so you have to buy less frequently they also contain way more ink than normal. The standard HP No. 301 colour ink cartridges only contain 3ml of tri-colour ink but these XL versions have twice as much (6ml). That’s double the amount of printing!