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Vent Systems 8" to 6" Inch Duct Reducer Adapter Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic PVC Pipe 200 to 150 mm - Amazon.com
VR151 | Manchon réducteur cônique PVC F/M Ø 50 x 63 mm à Ø 80 x 100 mm
DWV PVC Coupling Slip 150mm - Convic Australia
Manchon de câble thermorétractable en PVC, 1KG, 29.8 ~ 150MM, pour batterie au Lithium 18650, + 100 pièces de papier adhésif isolant - AliExpress
Vent Systems 8" to 6" Inch Duct Reducer Adapter Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic PVC Pipe 200 to 150 mm - Amazon.com