Mybecca 12 PACK Premium PYRAMID 2-inch Acoustic Foam Studio Soundproofing & Sound Isolation Wall Tiles 12 X 12 X 2 Inches for iTunes and Youtube Recording, Made in USA Color: CHARCOAL; Multiple pyramid wedge comes in tiles (2 pyramid wedges = 1 tile) Size: 2" x 12" x 12" ; Noise Reduction: 80-90% Eliminates Standing Waves And Flutter Echoes; Reduces Unwanted Reflections; Reduces Unwanted Reflections Good for studios, recording studios, vocal booths, control rooms. Product Care: Occasional Vacuuming of Dust