This is a sound absorbing foams, giving you a quiet space, greatly improve the comfort of staying. Soundproof engineering not only soundproof, but also a great inexpensive way to clear your low end bass nodes. Features -Material: -Size: About 25.00X25.00X5.00cm/ 9.82X9.82X1.97inch -Made of material, light and durable. -Noise sound-absorbing material is a high-performance product. -Soundproofing panels good for studios, recording studios, vocal booths, control rooms. - Great for spot treating sound on walls in your or office, for use in recording studios, control rooms, offices home studios, home entertainment theaters. -Its interior is full of small voids and semi-open pore structure can absorb a lot of energy incident on the acoustic attenuation of sound waves play a role, reducing chamber reflected sound interference and response, improve the purity of sound. Package list: 12 x sound-absorbing panels