www.safetyandhealthmagazine.com/articles/multi-plug-firestop-system-2

Multi-plug firestop system

January 1, 2011
This multi-plug firestop system seals cable penetrations through fire-rated floors and walls, preventing the spread of fire, smoke or water from one area to the next. Ideal for safeguarding commercial buildings such as hospitals and research facilities, as well as on-shore and off-shore oil rigs, petrochemical refineries, and ship decks and bulkheads.
Nelson Firestop Products