Our coil heater resistances are specially designed for heating of cylinders and plastic injection nozzles.our cartridges are the most suitable for heating cylinders and joints. There cartridges, though of small diameter, have great heating power, distributing uniform heat at 360oC. The heater wire is of the hihest quality with a thin outer layer of magnesium oxide and enclosed in a stainless steel cover. Everthing goes through a process of compression, thereby giving longer life as well as reaching a temperature of 800oC.The whole cartridge is hermetically sealed to prevent the entry of extraneous materials, moisture, fluids, etc.