WHITE LOUVRE AIR VENTS Small/Large Ventilation Ducting Brick Wall Grille Cover !
The Vents Are Designed To Cover Standard Brick Sizes. These Are All Louvred Air Vents. Single - Fits Over 1 Brick. White : White Plastic Vent. Double - Fits Over 2 Bricks. 9" x 6" Double (Overall: 258mm x 164mm).