4 PACK Acoustic Wedge Soundproofing Wall Tiles 12 X 12 X 1 inch, Made in USA Wedges are shipped in tiles wherein 1 TILE = 2 WEDGES (put together). (Ex. You ordered 24 pack; you will receive 12 tiles) Multiple orders may either be shipped in separate packages, or combined, depending on the quantity. Size: 1" x 12" x 12" ; Noise Reduction: 80-90%; Color: Charcoal Eliminates Standing Waves And Flutter Echoes; Reduces Unwanted Reflections; Reduces Unwanted Reflections Technical Bulletin California 117-2013 Flammability Standard Compliant Very Good Quality High NRC Good for studios, recording studios, vocal booths, control rooms. Product Care: Occasional Vacuuming of Dust