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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23
Pack of 288
6 Metres of felt support trays
Bolt length is the measurement of the thread
externally mounted unit which offers no means of access for the bats to enter the roof space or the property
British made
White Gravity Flap Air Vent & Back Draught Shutter 4 Inch Extractor Fans & Vents Pack of 288Product Description White 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. 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 commercial and
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