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spacious and habitable area to allow swifts to nest
Integral nest concave provides ideal starting point for nest building
however in individual cases additional hose may be necessary
When bent into an angle: 35mm x 35mm
Instructions Included
Brown Louvre Extractor Air Vent & Back Draught Shutter 4 Inch Screws and Fixings spacious and habitable area toProduct Description Brown Air Vent & Back Draught Shutter For 4 Inch (100mm) Extractor Fan Ducting Louvre Vent Louvre wall vent with 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 domestic use. Other
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