The F218 12 25 Silver Double Ply Black Poly R-8.0 by Mueller Streamline is designed for superior insulation performance. This product features a robust double ply construction, ensuring durability and efficiency in thermal management. With a thermal resistance rating of R-8.0, it is ideal for applications requiring effective temperature control. The black poly finish enhances its resistance to environmental factors, making it suitable for both indoor and outdoor use. Measuring 12 inches in diameter, this insulation is compatible with various HVAC systems, providing a reliable solution for energy conservation. Its lightweight design facilitates easy installation, while the high-quality materials ensure long-lasting performance.