The F116 07 50 Double Ply Black Poly Flex Duct R-6.0 by Mueller Streamline is engineered for superior insulation and airflow in HVAC systems. With a robust double-ply construction, this duct offers excellent durability and flexibility, making it easy to install in tight spaces. The R-6.0 insulation rating ensures optimal thermal performance, reducing energy loss and enhancing system efficiency. This duct is compatible with various HVAC applications and meets industry standards for safety and performance, making it a reliable choice for both residential and commercial installations.