Extractor Fan Ducting Wall Gravity Flap Grille Ventilation White 4", 5" & 6"
Gravity Grilles will stop the wind from blowing back down the ducting. 110x54mm is used for Flat channel ducting for 110x54mm, 100 & 125mm dia duct connections. SQUARE EXTRACTOR AIR VENT DUCT GRILLE 4", 5", 6"& 110x54mm.