DURA 5 in. x 2 in. Schedule 40 PVC Reducer Bushing SPGxS 437-486 - The Home Depot
Vent Systems 6" inch 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
NDS PVC S&D Increaser/Reducer Coupling, 4 in. Hub X 6 in. Hub 6P07 - The Home Depot
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
6 x 5" PVC Duct Reducer Coupling 1034-RC-0605
Drain Coupling, 6 to 5 in. Straight Adaptor, PVC Rubber
NDS 4-in PVC Sewerand Drain Coupling in the Sewage Pipe & Fittings department at Lowes.com
6" to 5" Inch Duct Reducer Round Reducer Duct Fitting Pipe Increaser Reducer PVC DWV (Drain, Waste and Vent) Reducing Coupling Plastic, White - Amazon.com
Master Flow 6 in. to 5 in. Round Reducer R6X5 - The Home Depot
Master Flow 6 in. to 5 in. Round Reducer R6X5 - The Home Depot
Amazon.com: HG POWER 5 Inch Dryer Vent Hose, 16 Feet Long Flexible PVC Hose, Three Layer Noise Reducer Hose Aluminum Ducting for Heating Cooling Ventilation AC Exhaust Black : Appliances
6" x 4" Red Coupling DWV Fitting, D102-532
Zoro Select PVC Reducer Tee, Socket x Socket x Socket, 6 in x 6 in x 4 in Pipe Size 401532 | Zoro
Carlon E952RP :: 6 IN X 5 IN SCH 40 SWEDGE REDUCER :: PLATT ELECTRIC SUPPLY
Jaagran PVC Coupler Reducer, for Pipe Fitting, Size: 2-6 Inch