Swettews 100 mm 125 mm 150 mm Round Pipe System PVC Ventilation Pipe Flex Hose Connector Bow Knee Piece Connector Backflow Flap T-Piece Reduction Holder Adapter (Diameter 125, Arc 90°) : Amazon.de: DIY & Tools
Drainage Pipe Connector Arc Tee Fitting Diameter 50 mm Diameter 72 – 100 mm Reducer Duct HT kg Drainage Valve 45 ° 67 ° 90 ° Lock Drainage Reduction Angle Channel Boots : Amazon.de: DIY & Tools
PVC - U reduction long 40-32 mm x 20 mm PN16 : Amazon.de: DIY & Tools
First Plast - Raccord PVC évacuation First Plast - Réduction PVC Excentrée MF 125/100 : Amazon.fr: Bricolage
Tuyau flexible en PVC flexible - Tuyau de ventilation plat pour système plat série K-6601 System 150 (90 x 220), longueur 3 m : Amazon.com.be: Bricolage
Fantronix 100 mm White PVC Pipe T Joint Ducting Connector for Round Plastic Tube 4 inch Tee Piece for Cooker Hood Extraction Whole House Ventilation Passive Stack Vent Bathroom Extractor Fan :
H&C VENT Universal Reducer Connector for Ventilation Duct PVC Transition 3-4 - 5-6 inch Diameter 80 100 120 125 150 mm - Multi-Size Round Pipe Air System Element : Amazon.co.uk: DIY & Tools