The FB116 04 25 Grey Double Ply Black Poly R-6.0 by Mueller Streamline is engineered for superior thermal insulation. With a robust double ply design, this product offers an R-value of 6.0, making it ideal for minimizing energy loss in HVAC applications. The insulation is crafted from high-quality black polyethylene, ensuring moisture resistance and durability. Measuring 4 inches in diameter and 25 feet in length, it fits standard piping systems perfectly. This insulation solution meets industry standards for safety and performance, making it a reliable choice for both residential and commercial installations.