Acoustic panels with -adhesive design.When you recive the acoustic foam panels, just and stick.Widely Used - acoustic treatment for many occasions, not only for live sound treatment on studio and office walls, also for recording studios,home studios and anywhere you needed.Sound insulation panels are multifunctional and can be used in professional studios, rehearsal rooms, concert , podcasts, churches, home theaters, vocal kiosks, home studios, offices, private spaces for men, and kennels , Sundries , etc. By using the absorption panel to eliminate unnecessary sounds, other sounds can be made clearer.Can eliminate indoor reverberation//standing wave/noise and the sound of the space.Made of polyester fiber material, which is environmentally friendly and harmless, safe to and touch,safe for adults, kids and pets.You can use it with .size: 30 x 30 x 5cmMaterial: Polyestercolour: grey+blackPackage Contents:12 x Acoustic PanelsOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.