The Southbend 1182157 Air Shutter regulates airflow into the burner assembly of compatible commercial cooking equipment. Supplied with a mounting bracket, this component has an outside diameter of 2-5/8 inches. Adjusting the shutter opening changes the amount of air entering the burner, influencing the air-and-gas mixture during combustion. The bracket supports installation in the spe... https://partsfe.com/air-shutter-for-southbend-part-1182157