Awenta Extractor Fan Back Draft Shutter 125mm / 5" Duct Non Return Valve Ducting Pipe Connector with Flap Backdraft Adaptor KO125-22

Awenta K0125 22 Valve Connector for VMC Ventilation System Diameter 125 mm

EUROPLAST 125mm / 5 Inch Duct Connector with Flange - Round PVC Ducting - Ventilation Pipe - Wall Plate

MKK Ventilation hose, diameter 125 mm, 0.5 m long, made of ABS plastic