Metacaulk® pipe collars are prefabricated firestop systems for through-penetrations using PVC, CPVC, ABS, PVC foam core, ABS foam core, FRPP, PEX pipe and electrical cable. UL classified for both open and closed pipe systems. Metacaulk® pipe collars feature an easy locking mechanism that assures simple installation. The collar's design greatly reduces the time and expense required to install competitive collars.