[Super sound insulation] Made of high-density polyester fiber cotton, the sound insulation effect is any foam on the market. Less odor, environmentally friendly, non-slip, -resistant, and non-fading. You can completely isolate indoor and outdoor noise. Professional sound insulation board, you can also use it as a bulletin board, multi-purpose, more convenient. [Fashion appearance] Stylish grooved panel design, it can not only absorb noise, but also can be used as a wall decoration for your favorite space. Just build and enjoy! [Good noise reduction] If you are mixing in a studio, you must lower the ambient sound. Unnecessary noise during recording will it. The sound-absorbing board can absorb the sound produced by low frequency, middle frequency and high frequency, which is very suitable for recording. [Easy to install] They can be used as acoustic covers for walls, ceilings and doors, just use glue or tape to easily connect them. Easy to shape and cut to size, easy to change without affecting performance, no special tools or materials required. [Wide range of application] It can be used in occasions to make the office quieter and cleaner recording. It can also be used in professional studios, rehearsal rooms, concert , podcasts, churches, home theaters, vocal studios, room decorations, offices, etc. Colour:dark gray Material:polyester fiber cotton Size:30 x 30 x 0.9cm Package Contents: 18 * 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.