Mybecca 2 Pack Acoustic Foam Soundproofing 1" X 12" X 12" Wedge Wall Tiles, Made in USA Acoustic wedges are the most basic of treatments for rooms, our 2 pack allows get an understanding of what to expect in the future 2 Pack 1 Inch Wedge Acoustics cover an area of 2 square feet Very effective High NRC Rating! 80-90% Good for studios, recording studios, vocal booths, control rooms. Technical Bulletin California 117-2013 Flammability Standard Compliant