Everbilt 2-1/2 - 4-1/2 in. Turn-Key Dryer Vent Clamp (2-Pack) 5Y0649B - The Home Depot
Everbilt 4 in. x 8 ft. Semi-Rigid Dryer Duct With Clamps 98251 - The Home Depot
VIVOHOME 4 Inch 25 Feet Aluminum Flexible Dryer Vent Hose Air Ducting Non-Insulated with 2 Stainless Steel Clamps for HVAC Ventilation and Exhaust Pack of 1 - Amazon.com