Fitment:1, 100112330 natural gas thermopile assembly, including pilot tube, collar nut igniter wire, millivolt generator and bracket.2, Fits For 300 Series, 301 series natural gas standard tank water heaters.3, Perfectly fit for Reliance, A.O. Smith, State, and American natural gas water heater. Model compatibility: GS6, GCV, GPX, GVK, XCZ.4, Made of high-quality material, and have a super long life. Provide you with continuous and stable hot water.5, Can perfectly solve the problem that the indicator light of the water heater does not light up all the time, and the water heater does not heat due to the damage of the thermocouple.6, Compatibility: The Natural Gas Pilot Assembly replace 100112330 9007876 9007877 etc. The 100112330 Pilot Assembly is fit for A.