The Eastman Flexible Aluminum Foil Dryer Duct with Worm Gear Clamps is used to connect clothes dryers to a wall outlet for venting. It is compatible with both electric and gas dryers, as well as both top-load and front-load machines. It is built of flexible, 4-ply aluminum foil for increased durability while maintaining flexibility. It is easy to install using the 2 provided worm gear clamps to create a secure connection. The duct is fire-resistant and tested to UL2158A.