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 Ventilator 197-00881-00 Butterfly Vent 956-03706-00 Spring Snap Hook 256-01130-00 Waterproof Plug and Socket 197-00307-WR