150mm Duct T Piece / Round Ducting Tee Pipe Hose Connector Extractor Fan Adaptor | eBay
Vintage Air 495920 Vintage Air Replacement Duct Hose Connectors | Summit Racing
Everbilt 4 in. x 8 ft. Dryer to Duct Connector Kit TD48D2DHD6 - The Home Depot
Amazon.com: Female Fit 4" Inch Metal Vent Duct Connector - Vent Extension - Galvanized Metal Pipe Connection - 4 Inch Dryer Vent Coupler - Metal Dryer Pipe Coupling - Rigid 4" Inch
4~6'' Round Plastic Flange Ducting Hose Connector Air Ventilation for Kitchen Hood Ventilator Pipe Connecting Exhaust Outlet - AliExpress
Ducting Union Hose Connector (60-60mm) – Cabcomfortdirect
IMPERIAL 4-in Galvanized Steel Flexible Duct Connector in the Duct Transitions & Connectors department at Lowes.com