Tecnomatic co-extruders are available, according to model and application, with inverter controlled AC motors or brushless motors and relative controllers, the latter being particularly suited to integration in complete lines and the synchronization with other components (extruders, haul-offs, gravimetric dosers). Tecnomatic also offers specific plasticization groups for the production of multi-layer pipes and higher power co-extruders for the extrusion of pellet U-PVC.