The F116 05 25 Double Ply Black Poly Flex Duct R-6.0 by Mueller Streamline is designed for superior insulation and airflow. This flexible duct features a double-ply construction, ensuring durability and efficiency in HVAC applications. With an R-value of 6.0, it provides excellent thermal resistance, making it ideal for both residential and commercial use. The duct measures 5 inches in diameter, allowing for easy installation in tight spaces. Its black finish not only enhances aesthetics but also minimizes light penetration, making it suitable for various environments. This product complies with industry standards, ensuring reliability and performance.