This is the replacement Oxygen Depletion Sensor or ODS pilot assembly with manual control for Majestic gas stove and fireplace models but may also fit on many of the other manufacturers and models based on fuel type and compatibility

Fuel Type: Liquid Propane (LP) 

Oxygen Depletion Sensors are fuel specific and may not be converted. You must replace the entire ODS and not portions of it. They are calibrated by the manufacturer.