The F116 07 25 Double Ply Black Poly Flex Duct R-6.0 from Mueller Streamline is engineered for optimal airflow and insulation. This flexible duct features a robust double-ply design, providing enhanced durability and resistance to damage. With an R-value of 6.0, it ensures effective thermal insulation, making it suitable for HVAC systems. Measuring 7 inches in diameter and 25 feet in length, it offers flexible installation options. The black poly exterior not only looks sleek but also protects against UV exposure. This duct meets industry standards for reliable performance in diverse applications.