Extractor Fan Grille Ducting Wall Black Gravity Flap Ventilation 4" 100mm

Black Extractor Fan Ducting Wall Gravity Flap Grille Ventilation White 4" 100mm. Black Extractor Fan Ducting Wall Gravity Flap Grille Ventilation 4" 100mm. 100mm / 4" Gravity Grille - Black For use with 100mm / 4" ducting systems.