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This 4 in. x 25 ft. flexible aluminum foil duct is ideal for bathroom fan exhausting and other general-purpose exhaust applications. 3 layers of aluminum foil laminate are included in its composition that will withstand up to 250Â°F temperatures. This product has been rated as an air duct connector under UL 181 and should never be used for dryer venting purposes.
Made from 3 ply aluminum foil laminate
Maximum operating temperature of this product is 250Â°F
Product should never be used for dryer venting applications
Rated as a ul 181 class 1 flexible air duct connector