Owens Corning 705 Rigid Sound Proofing Insulation Fiberglass Board, 2 Inch (4PK)

4 Pack of 24" x 48" x 2" boards NRC rating of 1.05 and ASTM E84 Class 1 or Class A Fire Rated Owens Corning 705 is a widely used insulation due to its strength, rigidity, and sound absorbing design