The F116 06 25 Double Ply Black Poly Flex Duct R-6.0 by Mueller Streamline is designed for efficient air distribution in HVAC systems. This flexible duct features a double-ply construction for enhanced durability and insulation, achieving an R-value of 6.0. With a diameter of 6 inches and a length of 25 feet, it is ideal for both residential and commercial applications. The black poly material provides a sleek appearance while ensuring optimal airflow and energy efficiency. This duct complies with industry standards, making it a reliable choice for contractors.