180mm Ducting Pipe Non Return Valve Round Duct Rigid Tube Connector with Shutter Extractor Fan Backdraft Damper Stopper $0.99 - $1.99 Min. order: 500 pieces 4 Inch Kitchen Bathroom Extractor Fan, 6 Inch ABS Ventilation Exhaust Fan, Plastic White Square Bathroom Kitchen Fan $3.89 - $4.99 Min....