When Package referred to above is the b / w cartridge 51645 with 42 ml and the color cartridge 6578 with 19 ml. Lately are HP no longer amounts in milliliters to, but shall designate those goods with an ominous "Page Number", the you can print for allegedly. This is obviously anti-consumer, because nonsense. Everyone can figure out that it in the pages above all it depends on what is printed there. Therefore, a lot of information is especially important for the price comparison. But HP makes even on the packaging no longer quantities! Zero points! Otherwise, I'm with (original!) - Satisfactory goods, with me so maintains a unit for approximately 2 years. Nevertheless, this printer is color (as someone has calculated) more expensive than the famous perfume Chanel No. 1. (The amount specified above is not a mistake: HP has the s / w cartridge also reduced by 4 ml!) Still, it's not worth it to respond to the numerous cheap offers, which are often more expensive. Many reviews refer as well to the lack of quality of refilled cartridges. SR