Vent Systems 6" to 5" Inch Duct Reducer Adapter Connector Fitting Pipe Increaser Reducer Cone for HVAC Ventilation Systems, ABS Plastic PVC Pipe 150 to 125 mm - - Amazon.com
Dedeman - Reductie tub ventilatie, PVC, alb, D 120 / 100 mm - Dedicat planurilor tale