IMPERIAL 4-in Dia Aluminum Dryer Vent Extender in the Dryer Vent Extenders department at Lowes.com
Cenipar Dryer Vent Hose-4 inch Ducting Vent Hose(4 inch 10 feet) with 2 Clamps and STV-90 Dryer Duct Connector Dryer Hose Snap fit 4in vent ducting : Amazon.ca: Home