Works in conjunction with 3M(TM) Fire Barrier Wrap Strip FS-195+ or Ultra GS for firestopping penetrations in wall, floor and floor/ceiling assemblies. Holds the wrap strip in place and provides anchor tabs for securing the collar assembly to the wall or floor. Convenient 25-foot (7.62 m) rollcut only what you need. Required for plastic pipes larger than 4 inches (101 mm) in diameter that have been firestopped with 3M(TM) Fire Barrier Wrap Strip FS-195+ or Ultra GS.