Products VentilatorRound Vent Back Ventilator 197-00883-00 Item Number :197-00883-00 *S.S. 5 “ Butterfly vent grills. *Made of S.S. 304. You May Also Be Interested In Ventilator,SS 556-11314-00 Butterfly Vent 956-03705-00 Anti-Siphon Valve 256-07126-00 Eye Bolt 956-05130-00