Introducing the Majestic Firestop FS338, an innovative and high-performance firestop system meticulously crafted to safeguard against the spread of fire and smoke in straight up flue applications. With its patented design, this firestop system ensures a swift, effortless, and secure fit for optimal protection. UL Classified and tested to withstand up to 4-hours of fire resistance, it offers unparalleled safety assurance. Constructed with a blend of intumescent and non-combustible materials, the Majestic Firestop FS338 delivers superior fire protection for both residential and commercial settings. It instills confidence in its reliability and durability. Easy to install and requiring minimal maintenance, this firestop system stands as the ideal choice for any building, providing peace of mind and protection for years to come.