The Montague MONB26 burner twin plate air shutter helps regulate airflow for efficient burner operation and consistent flame performance. Designed with two slots and a .463-inch orifice hole, this component controls the amount of air mixed with gas before combustion occurs. It works by allowing airflow adjustments within the burner assembly, helping achieve a proper air-to-fuel ratio ... https://partsfe.ca/monb26-montague-air-shutter