Specified Technologies SpecSeal174 Firestop Plug, For 4 In. Opening

Intumescent expands in all directions Reinstallable easy retrofitting of cables Easy to install, no special tools required Soft and resilient foam conforms to cable surfaces Paintable can be painted to match surroundings FP intumescent firestop plugs are soft and suppleThe intumescent plugs expand when exposed to heat to quickly close off around combustible jacketed cables