iPower GLDUCT4X8C Non-Insulated Ducting Aluminum Foil Vent with 2 Clamps, 8-Feet 4-Inch, ProFlex Clothes Dryer Transition Duct, Fire-Resistance Coating. Strong and Flexible, Contains Corrosion Resistant Wire Helix, Temperature Range from 0 to 185+ F, Free Pair of 4-Inch Metal Clamps