FloraFlex Flexible Four Layer Ducting, 12 Inch x 25 FeetThis ducting is engineered for a wide range of ventilation, air circulation, and heating cooling transfer applications. It boasts a four layer construction, offering superior durability and leak resistance compared to single layer alternatives. The inner layer is crafted from heavy duty dual aluminum foil, which is flame and fire resistant. The outer layer features dual PVC thermoplastic, providing protection against cuts, tears, and leakage. An