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Adapter converts to a round opening that can be attached to a soil stack
Can be applied to most surface and is resistant to water
Satisfies NHBC Standards 2008
Extendable Cavity Sleeve Airbrick Vent
Terracotta Hooded Cowl Vent Cover for Air Bricks Grilles Extractors Cowl Size:9 x 6 Terracotta Cowl Adapter converts to a roundProduct Description Terracotta Cowl Vent Cover Weather protection cowl. Wall vent cowl cover for air bricks vents and grilles. Surface mounted. Protects against excessive weather conditions. Helps prevent wind noise draughts and air Blast through air bricks etc. Manufactured with UV stable materials to reduce colour fade. British made. Suitable for commercial and domestic use. 9 x 3 Inch (228mm x 77mm) Overall size 10" x 3 3 4" (255mm x 95mm) Bottom