EcoTouch QuietZone® PINK FIBERGLAS Acoustic Insulation (Specific for 2" by 4" WOOD framed walls with joists spaced 23" apart) Dimensions: 3½" x 23" Coverage: 195.2 sq. ft./bag Application: Walls (interior partitions), Floors, Ceilings Owens Corning QuietZone® Insulation, with its outstanding acoustical and thermal performance, has easy to install friction fit batts. Acoustically engineered to absorb sound energy within wall and floor cavities, this non-combustible insulation is formaldehyde-free and GREENGUARD indoor air quality certified. Data Sheet