[ sound insulation]: Made of 215 kg/ high-density environmentally friendly polyester fiber cotton, sound insulation foam has great advantages in reducing and absorbing noise. In addition, the sound insulation foam panel performs in the noise reduction ,B1 class retardant, Reaching 0.95 level, most audio panels on the market. []: Fashionable design doubles as decorative wall art for your favorite space. It can be used in recording studios, KTVs, offices, home theaters, etc. allowing you to leave countless beautiful memories in a comfortable environment. [Good noise reduction]: If you are mixing in a studio, you must lower the sound. Unnecessary noise during recording will destroy it. The sound-absorbing board can the sound produced by low frequency, middle frequency and high frequency, which is suitable for recording. [Easy to install]: With self-adhesive design, you just need to tear off the top liner on the back and stick the sound insulation board to the wall. They can be used as acoustic covers for walls, ceilings and doors, just use glue or tape to connect . Easy to shape and cut to size, easy to change without affecting performance, no tools or materials required. [Wide application]: High-quality acoustic treatment suitable for many occasions, not live sound on the walls of studios and offices, also for recording studios, control rooms, office home theaters, and home offices. The color of the adhesive is random, and the designation is not accepted size:30x30x0.9cm Material:polyester fiber cotton colour:Dark Grey Package Contents: 12 * Soundproofing Foam 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.