[-adhesive] The third-generation sound-proof foam panel is very easy to install, and there is adhesive paper on the entire back, which is convenient for fixing on the wall and ceiling. No additional or materials are required for installation. Tear off the thin paper and paste it. Installation is very simple [2 inches (approximately 5.1 cm), better sound absorption] 3D acoustically designed sound-proof foam helps to break the sound waves, which is very suitable for individuals to reduce and absorb unnecessary , fluctuation and reverberation, and increase sound . The foam is thicker, and the sound absorption effect is better. When playing guitar or piano, you 't need to worry about disturbing others.[Easy to cut] You can scissors to cut any size you want, and the change will not affect the performance. You can a variety of colors of acoustic foam to splice your favorite decorative patterns. Make your room more interesting. Therefore, the sound insulation foam board is very suitable for wall decoration. Say goodbye to the old wall [Environmental protection, fire resistance] Sound insulation foam is made of environmentally polyurethane foam material, using professional grade non-toxic and odorless foam. In addition, we add retardant formula to the sponge to reduce sudden danger and safety, so you can install it at any time.[Applicable to different scenes] Widely used in recording studios, home theaters, vocal kiosks, conference rooms and control rooms. And it can easily cover a area, because 12 packs cover an area of 4 feet, each tile is a 2-inch thick acoustic slope, and the area of sound insulation foam is larger, and the noise reduction effect is better.Colour: black + redMaterial: polyurethaneSize: 30x30x5cmPackage Contents:6 * Blacksoundproof cotton6 * Red soundproof cottonOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.