Spring Coil Heater Hot runner coil Heater, is enclosed to inner and outer pipes , which ensure the body heated uniformly. 1 Coil heater is small section linear heating elements. 2 Voltage and power according to your requirement. 3 It is useful for hot runner mould, plastic injection, plastic extruder machine etc. 4 Thermocouple type k/j/e can be attached. 5 1 year guarantee time. http://www.snakehotrunner.com/