[High density]: 230kg/m3, the most compact sound card on the market for noise suppression, cushioning, acoustic insulation, cancellation, mixing speakers and other sound absorption. [HIGH DENSITY AND ECO-FRIENDLY]: Made with Polyester cotton Fiber, it is both safe to breathe in and Press, making it great for any location in the home or studio, it's safe for adults, kids, and pets! [IMPROVED ACOUSTIC QUALITY]: These noise-insulation panels are multi-purpose, it can be used for professional studios, rehearsal rooms, concert , podcasting, churches, home theaters, vocal booths, home studios, offices, man caves, dog kennels, utility closets and more. By deadening unwanted sound using absorption panels, you can make other sounds much clearer. [EASY TO INSTALL]: Can be installed by anyone! Simply attach double-sided tape to the back of each piece and in the desired position - this is it! [APPLICATION]: 0.95 - LAB test noise reduction factor; These noise cancelling foam panels can be mixed and match for aesthetic looks and design. Perfect for individuals to reduce and absorb unwanted echoes, waves, reverb and flutter echoes and wall decoration. colour: black Material: polyester fiber cotton size: 30x30x0.9cm Package Contents: 12 * Acoustic Panels 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.