Our HP compatible inks are manufactured to match the inks in the HP OEM (original)cartridges. Different cartridge inks will likely differ in viscosity, surface tension, chemical composition, and shade from other inks. This way we ensure that you have the best quality inks available with performance that matches the original HP inks.

Promoters of "One Size Fits All" inks are simply trying to reduce the inventory they have to carry -- and your print quality will suffer because of it.