The Service Kit Pro contains everything needed for a complete service of Airrex AH-series diesel heaters. Recommended for machines that are 3 years or older, or when a full overhaul is needed. The kit contains: Nozzle Fiber gasket Graphite gasket Fuel filter Spark igniter Extraction hoses (2 pcs.) Suction hose (1 pc.) Airflow regulator Rubber grommet Available for three heater families: AH-200/300, AH-200i/300i (Wifi), AH-800/800i (Wifi). Select the correct model at checkout.