Hon&Guan 4 Inch Draft Blocker Backdraft Damper Inline Extractor Fan Vent Back Draught Shutter (100 mm)

Hon&Guan 4 Inch Draft Blocker Backdraft Damper Inline Extractor Fan Vent Back Draught Shutter (100 mm)

• Compatible with diameter 4 Inch.
• Male backdraft shutter is lightweight & compatible with Hon&Guan ducting.
• Easy DIY. Designed to provide anti back draught, and fit in between Solid Plastic Ducting, Flexible Ducting.
• For use in domestic ventilation applications; kitchens, toilets,bathrooms & hydroponics.
• Package Include: Vent Back Draught Shutter x 1