The Garland 1028000 Air Shutter is a burner component that regulates the amount of air entering the combustion area in compatible commercial cooking equipment. Adjusting the air opening supports the intended air-and-gas mixture for burner operation. Correct positioning is necessary for the burner assembly to receive the appropriate airflow according to the equipment configuration. https://partsfe.com/air-shutter-for-garland-part-1028000