8" Inch Couplings for Ducts Without Gaskets - Metal Vent Duct Connector - 8 Inch Vent Extension - Galvanized Metal Pipe Connection - 8 Inch Dryer Vent Coupler (Galvanized Steel, 8") - - Amazon.com
Amazon.com: 5" Inch Metal Tee Cap - Round Vent Cover - Galvanized Steel - Indoor and Outdoor Pipe Cover - Dryer Vent Cover - Dryer Duct End Cap - 5In Metal End
10'' Inch Duct Collar Air Tight -for Connecting Flex Ducting (Metal w/Rubber Gasket, 10'') - - Amazon.com