The F218 18 25 Silver Double Ply Black Poly R-8.0 by Mueller Streamline is engineered for optimal insulation performance. With a robust double ply construction, this product ensures durability and high thermal resistance, rated at R-8.0. Measuring 18 inches in diameter, it is suitable for a variety of HVAC applications, providing effective temperature control. The black poly finish not only enhances its aesthetic appeal but also protects against environmental wear. This lightweight insulation is easy to install, making it a practical choice for both residential and commercial projects. It adheres to industry standards, ensuring reliability and efficiency in energy savings.