Grid Sound-Absorbing Panels Materials: Foam, Acoustic Foam, MDF Dimensions: 19.7 x 19.7 inches (500x500mm) Weight: 2.02 lbs (0.915kg) Grid panels enhance room acoustics by reducing echo, controlling reverberation, and balancing mid-to-high frequencies. Their design combines efficient sound absorption and diffusion, making them ideal for both professional and home use. The microporous foam absorbs sound, while the 3D surface scatters reflected sound, delivering clear, high-quality audio. Available in 7 colors, these panels are perfect for recording studios, home theaters, offices, and more. Specs: Absorption & Diffusion Frequency Range: 350Hz-5000Hz NRC: 0.67 Thickness options Applications: Studios, theaters, offices, rehearsal rooms, conference rooms. Mounting: Wall mount with "FoamFix" brackets (included) Ceiling mount with construction adhesive (liquid nails) recommended.