[Excellent sound insulation] Made of 215 kg/m3 high-density environmentally friendly polyester fiber cotton, our sound insulation foam has great advantages in reducing and absorbing noise. In addition, the sound insulation foam panel performs well in the noise reduction test ,B1 class flame 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 ambient sound. Unnecessary noise during recording will destroy 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]: 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 easily connect them. Easy to shape and cut to size, easy to change without affecting performance, no special tools or materials required. [Wide application] High-quality acoustic treatment suitable for many occasions, not live sound on the walls of studios and offices, but also for recording studios, control rooms, office home theaters, and home offices. In addition, our sound insulation foam board also has a of colors, which is a good idea for . Colour:black Material:polyester fiber cotton Size: 30 x 30 x 0.9cm Package Contents: 12 x Sound absorbing panel(Adhesive: random color, 't accept the specified color) 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.