You've made a smart decision buying the HP Photosmart C4785. Lovely printer. The best. It uses HP 300 ink cartridges. We sell the HP 300XL ink cartridges. They will work in your C4785 printer. They will last longer than the normal HP 300 cartridges. They cost only a teeny tiny little more than the normal HP 300 inkjets. The saving you make is significant. Buy now and have them on the next working day.