£11.57
Airflow 100mm Round Condensation Trap for Ventilation Ducting – Prevents Water Backflow, Compliant with Domestic Ventilation Guide
£10.39
FUTUREORYY PVC Backdraft Damper Manual Air Duct Damper One-Way Airflow Preventer for Range Hood Ventilation, 110mm Round Duct Insert for Extractor Fan and Dryer Vent