Description
Knightsbridge 100mm/4 inch Gravity Shutter – White or Black
Ideal fuss free solution when you need to install a hole in an external or internal wall. Suitable for use with 4 inch/100mm fan via round ducting.
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For use with 4 inch/100mm fans
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Compatible with 4 inch/100mm round rigid or flexible ducting
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Prevents backdraught air and rain penetration
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Prevents objects of vermin entering when the ventilation is not in operation