The F216 12 25 Silver Double Ply Black Poly insulation by Mueller Streamline is designed for optimal thermal performance. With an R-value of 6.0, this insulation is perfect for energy-efficient applications. The double ply construction enhances durability while providing excellent resistance to moisture and environmental factors. Measuring 12 inches in diameter, it is suitable for a variety of piping systems. This insulation is compliant with industry standards, making it a reliable choice for both residential and commercial projects.