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Sti Firestop Grommet is designed to seal penetrations of individual or small bundles of cables through gypsum board walls for 1 hr. and 2 hr. fire-rated assemblies. Made from premium plenum-plastics with a soft foam inner core, this grommet eliminates the need for sleeves, firestop putties, and sealants. Ideal for addressing single membrane or complete through-penetrations, it is perfect for alarm, security, or wireless access point installations. With a professional finished appearance and available as a single cable or multiple cable solution, this grommet ensures optimal safety and peace of mind.