The preeflow eco-DUOMIX precision volume dispensing unit made by preeflow enables mixing and dosing of the smallest quantities of 2-component fluids and pastes.Inside the capsule, the motor-driven mixer ensures optimum mixing of even difficult to process components despite its small volume. Precise application of even the smallest sealing beads is achieved by means of an exchangeable dosing needle, which is mechanically connected to the mixing capsule.