Extruder band heater are the ideal solution for high watt densities and high operating temperature applications, especially for the plastics industry. Extruder mica heater ring can be found in several types of dimensions, wattage, voltages and material. Extruder mica heater ring is an inexpensive form of heating solution to external indirect heating. And strip type is also very popular. Extruder mica heater ring use electric heating (NiCr 2080 wire) to heat-up the external surface of drums or pipes and high quality mica material insulated.