Monessen has become alright known for creating the absolute best in fireplaces and hearth accessories, and this product is completely no different. The Monessen Thermostat Bulb Sensor for Millivolt Model Only is meant to be used on the Monessen Millivolt Model only. This sensor acts to feature thermostat operation to a Millivolt on and off valve, making your life easier and far more convenient overall. Priced affordably, you cannot afford to pass this Thermostat Bulb Sensor up! Get yours today for this great low price, and obtain able to enjoy your fireplace in ways in which you never thought were possible.