The coil heater part number is CL50-040A. The coil heater inner diameter is 0.500", and the coil heater length is 4.00". The electric coil heater leads are 36" long with stainless steel overbraid. The electric heating coil also comes with a ground wire and a TYPE J thermocouple. The coil heater is made for 240 volts and 1000 watts. This Viper coil heater has a .13" by .13" square cross section. The lead orientation of the coil heater is CL1.