Products VentilatorRound Vent Back Butterfly Vent 956-03704-00 BUTTERFLY VENT STAMPED AISI 304 ITEM NO. Dia mm Weight/g 956-03704-00 100 (4") 73 956-03703-00 125 (5") 67 You May Also Be Interested In Round Transom Vent 956-03727-00 Butterfly Vent 956-03704-00 Light 556-10775W-00 Round Ring with Bar 956-04162-00