System Composed of Cartridges and Mixers

A system consisting of several different types of similar cartridges and several different types of similar mixers that can be connected with these, whereby the cartridges as double cartridges have two containers that are connected with each other having an outlet opening or an outlet connector respectively, and the mixers respectively have two inlet openings or inlet connectors that can be coupled to the outlet openings or outlet connectors of the cartridges,

• wherein the size of the inlet openings or inlet connectors for each mixer type and the size of the outlet openings or outlet connectors for each type of cartridge is the same, and that for associating at least one type of mixer with at least one type of cartridge each type of mixer is equipped with a cross section that is different than that of the other types of mixers, that a guide protrusion extends in axial direction of mixer, and wherein each cartridge type is equipped with an opening that is different in cross section from the other types of cartridges for accepting a guide protrusion of a mixer.