Rytons 9x3 Airbrick Cover/Ducting Cowl Buff/Sand

Surface mounted cover for 9x3 openings, air bricks, grilles and vents. Protects against excessive weather conditions and alleviates air blasts through the cavity. 9×3 is a nominal size with the vent larger to cover any damage to the surrounding area. Total size is 255mm L x 96mm H x 44mm D (see image gallery). Free Area 8,700mm² (87cm²) per unit., Manufacturer: Rytons Building Products Ltd