AC INFINITY Flexible Four-Layer Ducting 25-Ft Long 4-Inch

Designed for ventilation applications including HVAC dryer grow rooms and tents.\\nFour layer design makes it more durable and resistant to leaks tears and cuts.\\nSteel-wire spiral structure is flexible and easy-to-install in hard to reach places.\\nConstructed of Aluminum and thermoplastic tube can be shortened for various applications.\\nDucting Size: 4” | Length: 25 feet | Includes two stainless steel 4\" duct clamps\\n\\nProduct Description\\nThis ducting is designed for various ventilation circulation and heating/cooling transfer applications. It features four-layer protection making it more durable and resistant to leaks than single-layer designs. The internal layer is made of heavy-duty dual aluminum foil that is fire/flame resistant. Its outer layer utilizes dual PVC thermoplastic that protects the aluminum from cuts and tears while stopping leakage. Each duct tube is held together by an internal steel-wire spiral that is flexible and easy to install in hard to reach places. T