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Moulded in mortar key ensures secure adhesion to the building fabric
Integral nest concave provides ideal starting point for nest building
For use with
5cmProtrudes 17
Unique design with built in spigot no additional adaptor kit required
Brown Hooded Cowl Extractor Air Vent & Back Draught Shutter 4 Inch access_doors_panels Moulded in mortar key ensuresProduct Description Brown Hooded Cowl Vent & Back Draught Shutter For 4 Inch (100mm) Extractor Fan Ducting Hooded Cowl Vent Hooded Wall vent with internal back draught shutter. Helps prevent backdrafts. Manufactured with UV stable materials to reduce colour fade. Dual fitting for round 100mm (4 Inch) ducting or square ducting. Overall size: 140mm x 140mm. British made. ABS thermoplastic. Complies with Part F building regulations. Suitable for
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