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Weather resistant
Designed to provide a clear airflow passage to the void underneath a suspended floor
Premium quality
Front: 20mm
Stand out from wall: 27mm
Grey Gravity Flap Air Vent & Back Draught Shutter 4 Inch Travel Kits Weather resistantProduct Description Grey Gravity Flap Air Vent & Back Draught Shutter For 4 Inch (100mm) Extractor Fan Ducting Gravity Flap Vent Wall vent with gravity flaps and weather sill. Helps prevent backdrafts. Manufactured with UV stable materials to reduce colour fade. Suitable for round 100mm (4 Inch) ducting. Overall size: 140mm x 140mm. British made. ABS thermoplastic. Complies with Part F building regulations. Suitable for commercial and domestic use.
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