Heartland | Sidewall | Dryer vent | Fan Vent | Energy Saver
Saf-T-Duct dryer periscope 23 inch extension piece
MagVent Dryer Vent Connectors - Lee Valley Tools
4" Inch Metal Vent Duct Connector - Vent Extension - Galvanized Metal Pipe Connection - 4 Inch Dryer Vent Coupler - Metal Dryer Pipe Coupling - Rigid 4" Inch Metal Hose Extension - - Amazon.com