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
8" x 6" Schedule 40 PVC Reducing Coupling, slip x slip 429-585
Order 8" x 6" PVC DUCT AirTech Concentric Reducer Coupling S x S (1006 04S 080060-IPS)
Zoro Select PVC Reducer Bushing, Spigot, 8 in x 6 in Pipe Size 837-585 | Zoro
Charlotte Pipe 6 in. x 8 in. DWV PVC Pipe Increaser Reducer Bush PVC 00102 1900 - The Home Depot
8" x 6" PVC Schedule 80 Reducer Bushing (Sp x S) - The Drainage Source
8 x 6 SCH80 PVC Reducer Coupling (Soc)
8" x 6" Schedule 40 Reducing Coupling 429-585
8" X 6" PVC SDR35 Solvent Weld Reducer Coupling (S x S) - The Drainage Products Store
Charlotte Pipe 6 in. x 8 in. DWV PVC Pipe Increaser Reducer Bush PVC 00102 1900 - The Home Depot
Fiberglass-PVC Swimming Pool Concentric Reducer - 6 in outlet-8 in inlet
6 X 8 in SDR35 Solvent Weld Reducer | Plumbers Supply Co
Charlotte Pipe 6-in x 8-in PVC DWV Reducing Bushing in the PVC DWV Pipe & Fittings department at Lowes.com
PVC Tapered Reducer For Duct & Pit Fan - 8" x 6" - QC Supply