Fire Barrier Gasket, 2-1/2" L, 4-1/4" H

Firestop Sheet, Fire Rating 3 hr, Fire Resistance Type Intumescent, Firestop Type Gasket Insert, Overall Width 0.11 in, Roll Length Not Applicable, Color Black, Features For Safe Retrofit Applications, Reduces Sound Transmission, Flame Spread Index 5, Outer Material Intumescent, Resistance Properties Fire Resistant, Sheet Length 2.5 in, Smoke Developed Index 5