FASHIONABLE HEXAGON DESIGN -Hexagonal sound insulation board adopts beveled edge design. Soundproof door can absorb unnecessary and decorate your wall . It can reduce and absorb unwanted echoes, waves, reverb and flutter echoes. Please check the product size carefully before buying. EASY INSTALLATION - The back of the acoustic panels are Self-adhesive, which are convenient to install . Just peel off the back film and stick each panel to your desired position. No special tools or materials needed when intallation. You can simply detach each panel and reinstall to the new desired location with no holes on your walls. ECO-FRIENDLY - Made with Polyester Fiber, Class B1 flame Retardant. Professional sound absorbing rugs are great for treating sound on walls in your studios and office. It can decorate your recording studios, control rooms, home theaters, home offices, etc. Safe, eco-friendly and odorless soundproof material. IMPROVED SOUND QUALITY - Made from 0.139g/cm3 high density polyester felt fabric, our soundproof wall panels do well in reducing noise( 0.9), eliminating sound impurity and improve speech intelligibility. Versatile - The uses of acoustic panels sound absorbing are very diverse. They help you create professional studios, rehearsal rooms, concert , home theaters, offices, vocal rooms, and more. Provide you with a private space for quiet enjoyment. Color: dark grey Material: polyester fiber cotton The color of the adhesive is random, and the designation is not accepted Package Contents: 16 x 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.