The UGL is a new family of nozzle heaters, which has been conceived to combine the benefits of PIROFLEX heaters hermetic construction with the non-hermetic PIROSLIM heaters high specific power performances (5 W/cm²). They are best suited in all the applications which do not present specific accommodation constraints or whenever the treated plastic material is corrosive. Their special construction makes them resistant to plastic material penetration thus insuring a good capability of operation even if plastic material leaks from the nozzle. These heaters are employed in all the plastic moulding machines where the operational temperature does not exceed 350°C.