Janusz W. Sikora in his presentation on Supplementary equipment increasing the quality of extruded products focused on supplementary preparatory and finishing devices constituting elements of an extrusion technological line. He paid special attention to supplementary preparatory devices such as: screen changers, melt pumps and static mixers. He discussed their construction, operation principles and division, underlying the fact that without their application, it is modernly impossible to receive high quality extrudates. The lecture was held within the scope of T 5.1a and dedicated to NEWEX project staff.