8 in. x 25 ft. Non-Insulated Flexible Aluminum Duct with
Two 8 in. x 25 ft. Non-Insulated Flexible Aluminum Duct with Scrim can be connected together by using an 8 in. diameter 28 or 30 gauge metal coupler or connector and two 8\" metal worm drive or gear clamps to tighten the two ends of the duct to the metal