Acoustic Foam Egg Crate Panel Studio Foam Wall Panel 48" X 24" X 2.5" 2.5" Convoluted Acoustic Wall Panels provide an ultra clean look and SUPERB sound absorption Great for spot treating sound on walls in your studio or office - For use in recording studios, control rooms, Offices home studios, home entertainment theaters, Home Offices Very Good Quality High NRC !! One of our thickest panels MADE IN USA - Fire Retardant: CA Technical Bulletin 117