The coil heater is known as CL50-045-108. The coil heater inner diameter is 0.500", and the coil heater length is 1.450". The electric coil heater leads are 45" long with fiberglass sleeving. The electric heating coil also comes with a ground wire and a type J thermocouple included. The coil heater is made for 240 volts and 250 watts. This Viper coil heater has a .13" by .13" square cross section. Compare this coil heater to SSTC-32. CL1 through CL5 Lead Orientations ? Click here to see the type CL4 lead orientation that this coil heater has.