9" x 9" Extendable Combination Cavity Wall Sleeve Vent with Blue/Black Air Bricks

White Air Vent Grille/duct covers with Fly Screen / Anti-Insect Mesh,no screws visible-separate backplate (round 150mm x150mm)

10 x Buff Air Bricks Vent 9" x 3" Brick Grille AirBrick Flow Vents Ventilation

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

White Air Vent Grille/duct covers with Fly Screen / Anti-Insect Mesh,no screws visible-separate backplate (125mm round)

White Air Vent Grille/duct covers with Fly Screen / Anti-Insect Mesh,no screws visible-separate backplate (135mm x135mm square)

Brown Hooded Cowl 9" x 6" Vent Cover for Air Bricks Grilles Extractors Vents

White Air Vent Grille/duct covers with Fly Screen / Anti-Insect Mesh,no screws visible-separate backplate (100mm x100mm round)

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

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

9" x 9" Extendable Combination Cavity Wall Sleeve Vent with Brown Air Bricks

Rytons 8.5 x 8 Terrracotta Cowl Air Vent Hooded Cover for Grilles and Extractors

White Hooded Cowl 9" x 6" Vent Cover for Air Bricks Grilles Extractors Vents

HomeSmart Cream Cowl Air Vent Cover 9"x6" - UV Stable, Weather Protection Vent Cover for Air Bricks

White Hooded Cowl 9" x 9" Vent Cover for Air Bricks Grilles Extractors Vents

White Air Vent Grille/duct covers with Fly Screen / Anti-Insect Mesh,no screws visible-separate backplate

Rytons 9" x 6" Terrracotta Cowl Air Vent Hooded Cover for Grilles and Extractors

9" x 3" Adjustable Air Vent Satin Anodised Aluminium/Metal Chrome Grille Cover

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

White Hooded Extractor Fan Vent Grille Cowl with Back Draught Shutter 4" 100mm