If your HP DeskJet, OfficeJet or PhotoSmart printer uses the HP No. 56 and No. 57 ink this is the best way to buy them. Ordering your black and colour printer ink online at the same time means you only have to deal with one order, one delivery and can change both cartridges at the same time. We will also not charge extra for our standard delivery service saving you even more money. So, what are you waiting for? Order the HP No. 56 and 57 black and colour combo pack online today.