The NTI Boiler 6000085040 TX External Spark Transformer is an ignition component designed for gas-fired boiler systems. It converts incoming electrical power into a high-voltage output, delivering the energy required to create a spark at the ignition electrode and light the burner’s fuel-air mixture. This transformer is used with compatible NTI gas boilers and is installed within the ... https://www.partshnc.com/nti-boiler-6000085040-tx-external-spark-transformer