The F204 07 05 Silver Sleeve- No Core R-4.2 from Mueller Streamline is engineered for optimal performance in fluid systems. This silver sleeve features a no-core design, enhancing fluid flow and reducing pressure drop. Rated at R-4.2, it provides superior thermal insulation, making it ideal for both heating and cooling applications. Constructed from durable materials, this sleeve ensures longevity and resistance to environmental factors. Its compatibility with standard fittings allows for easy integration into existing systems, making it a valuable addition for both new installations and upgrades.