Products VentilatorRound Vent Back Butterfly Vent 956-03705-00 BUTTERFLY VENT STAMPED AISI 304 ITEM NO. Dia mm Weight/g 956-03705-00 100 (4") 69 956-03706-00 125 (5") 100 You May Also Be Interested In Ventilator 197-00882-00 Round Transom Vent 956-03727-00 SLIDE ADJUSTER 397-BS17 Waterproof Deck Copper 197-00315-00