High density and eco-friendly: 230kg/m3 Density. Our sound proofing padding for wall are excellent at improving sound clarity, achieving an average absorption coefficient: 0.8, the best choice for absorbing the noise generated by low frequency, middle frequency and high frequency. Made with Polyester Fiber, flame Retardant, it is both safe to breathe in and Press, making it great for any location in the home or studio, it's safe for adults, kids, and petsInclined acoustic design: The stylish sloped panel design doubles as the decorative wall art of your favorite space, allowing you to leave countless beautiful memories in a comfortable environment.Advanced sound insulation: Made of high-density polyester fiber cotton, 300 pounds per cubic yard, better sound insulation effect than sound insulation foam Sound insulation, flame retardant, odorless, non-slip, corrosion-resistant, and anti-aging.Simple installation: both general spray adhesive and double-sided tape can be used. Just stick spray adhesive or double-sided tape (not included) on the back of each panel and stick it in the desired position.Widely used: Very suitable for sound therapy on the walls of recording studios or offices-used in recording studios, control rooms, office home studios, home entertainment theaters, home offices. Easy to shape and cut, modification will not affect performance. Or use it behind a sling, TV, or under the carpet.Colour:Black+whiteMaterial:Polyester cottonSize:30 x 30 x 0.9cmPackage Contents:3 * Black sound insulation board3 * White sound insulation boardOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.