12 PACK Premium EGGCRATE Convoluted Acoustic Foam Wall Panel Studio Soundproofing Wall Tiles 1.5 X 12 X 12 Inches, Made in USA Color: CHARCOAL; Multiple convoluted eggcrate wedge comes in tiles (2 convoluted eggcrate 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