Acoustic panels with self-adhesive design. When you receive the acoustic foam panels, simply peel off the backing paper and stick them on. Wide Application - Excellent acoustic treatment for many occasions, not only for live sound processing on studio and office walls, but also for recording studios, home studios, and wherever you need it. The soundproofing panels are multifunctional and can be used in professional studios, rehearsal rooms, concerts, podcasts, churches, home theaters, vocal booths, home studios, offices, private spaces for men and kennels, various closets, etc. By using the absorption panel to eliminate unnecessary sounds, other sounds can be made clearer. Can effectively eliminate indoor reverberation/standing waves/noise and improve the sound clarity of the space. Made of polyester fiber material, which is environmentally friendly and harmless, safe to breathe in and touch, safe for adults, children, and pets. You can use it with confidence. Size: 15 cm Material: Polyester Color: black Package Contents: 12 x 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 to be slightly different from the real thing. The allowable measurement error is +/- 1-3 cm.