High-quality materials: Made of 230kg/m3 high-density environmentally friendly polyester fiber cotton, our sound insulation foam has great advantages in reducing and absorbing noise, and can be breathed and touched safely. In addition, the sound insulation foam panel performed well in the noise reduction test, reaching a level of 0.95, which is all audio panels on the market. Safety and environmental protection: Our audio panels are sound insulation, flame retardant, odorless, non-slip, anti- and anti-fading, so they are safe for adults, children and pets! Use our studio foam panels on the ceiling, behind the TV or under ,Leave countless beautiful memories in a comfortable environment. Easy to install: There is self-adhesive glue on one side of the sound-absorbing panel. It is convenient to fix it , you don't need to prepare too much glue or other things to fix it. Simple but necessary design will reduce your workload. Cut easily with a knife, if you want to disassemble, just disassemble each panel and reinstall it to the desired position, no holes in the wall! Good sound absorption characteristics: If you are mixing in a studio, you must reduce 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. Multi-purpose: These acoustic panels are very suitable for decorating ceilings and walls; very suitable for kindergartens, beer bars, recording studios, game rooms, home theaters, offices, podcasts, , etc. Side length: 17.5cm Material:polyester fiber cotton colour:Silver gray Package Contents: 12 * Soundproofing Foam (The color of the adhesive is random, the specified color is not accepted) Only the above package content, other products are not included. Note: Light reflection 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.