1:3D acoustic design: Our 2-inch foam can provide moderate sound control or ceiling. It is very suitable for individuals to reduce and absorb unnecessary , wave, reverberation and floating . 2:Environmental protection: Made of environmentally friendly polyurethane foam, 50 per yard, the sound insulation board not only has effective sound absorption characteristics, but also will not cause any harm to our body. 3:Quick return to normal size: Open the vacuum package and put the foam panel in a ventilated place for about 24-48 hours. Another is to soak the foam in water for one minute, then wring the foam out of the water and air dry or use a hair dryer. You can also let them tan in the sun! 4:Installation : It is recommended to stick the tape to the four corners and the center of the back of the acoustic foam panels, and then to the wall. Or you can purchase spray glue to install the soundproofing foam according to your needs. 5: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 the. Colour:black Material:Polyurethane Size:30 x 30 x 5cm Package Contents: 24 * soundproofing foams Only the above package content, other products are not included. Note: Light 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.