Another Durex innovation for the hot runner molding industry, nozzle and sprue heaters comprise a hollow cast copper alloy and stainless steel outer shell for optimum heat transfer with extra protection. Precision machined I.D. for a press fit installation. The copper alloy achieves maximum temperatures to 1200°F (649°C). Sealed heater construction eliminates failures due to contamination and moisture. An optional internal thermocouple is offered for integral temperature control.