Fully automatic multi-component dosing units for high-precision in-line dosing and mixing of a base product (e.g. silicone, acrylic, PU sealants, adhesives, greases) with several additives, such as pigments or catalysts. Due to the extremely high dosing accuracy, which can be up to drop-precise depending on the model, almost any mixing ratio can be achieved. A multi-stage static mixing section enables rapid mixing of the components for further processing without reducing production output.