Ducting Gravity Flap 125mm / 5" Cowl Ventilation Air Vent

Stainless Steel 150mm 6" Gravity Flap Vent. Perfect for intermittent fans.

AirTech Grey Air Vent Grille Gravity Flap External Ventilation Cover Ducting (Cowl) 4" (100MM)

Brown Duct Gravity Flaps 150mm x 150mm / 100mm Vent Cover

AirTech Cowl Gravity Flap Wall Non-Return Valve Cowl Duct Cover Air Vent Grille 100mm (White)

Black Duct Gravity Flaps 190mm x 190mm / 100mm / 4" Vent Cover

Duct Gravity Flaps 150mm x 150mm Ventilation Cover

White Duct Gravity Flaps 190mm x 190mm / 150mm Vent Cover

Black External Gravity Flaps 150mm /6" Ventilation Duct Cover

AirTech Cowl Gravity Flap Wall Non-Return Valve Cowl Duct Cover Air Vent Grille 100 duct opening brown

External Air Vent Hooded Duct Cover Gravity Flap Cowl Grille BROWN Plastic 100mm

Graphite Duct Gravity Flap 190mm x 190mm / 100mm Air Vent Grille

External Air Vent Hooded Duct Cover Gravity Flap Cowl Grille WHITE Plastic 100mm

White Duct Gravity Flaps 190mm x 190mm / 125mm Vent Cover

AirTech-UK Cowl Gravity Flap Wall Non-Return Valve Cowl Duct Cover Air Vent Black-100mm

AirTech Ducting Cowled Gravity Flap 150mm / 6" Outlet Cowl Air Vent Grille with Non Return Valve / Backdraft Shutter

Anthracite Duct Gravity Flaps 190mm x 190mm / 125mm Vent Cover

Gravity Flaps Ducting 5" / 125mm Wall Ventilation Air Vent

Stainless Steel 100mm 4" Gravity Flap Vent. Perfect for intermittent fans

Air Vent Hooded External Duct Cover Gravity Flap Cowl Grille GRAPHITE 100mm