The F118 10 25 Grey Double Ply Black Poly by Mueller Streamline is an R-8.0 rated insulation sleeve designed for optimal thermal efficiency. This product features a robust double ply construction, ensuring durability and effective insulation. The grey exterior allows for easy identification during installation, while its dimensions provide a snug fit over pipes. Ideal for HVAC systems, this sleeve helps minimize energy loss, making it essential for energy-efficient installations. It meets industry standards for safety and performance.