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The textured surface helps maintain the aesthetic of the roof while delivering effective ventilation performance
Width: 50mm
The slate grey finish blends cleanly with a wide range of roof tiles
• Hardened
Channels clip together for easy on-site fabrication
White Gravity Flap Air Vent & Back Draught Shutter 4 Inch Extractor Fans & Vents The textured surface helps maintainProduct 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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