Acoustic panels with self-adhesive design.When you recive the acoustic foam panels, just peel and stick. Widely Used - Excellent acoustic treatment for many occasions, not only for live sound treatment on studio and office walls,but 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 wardrobe, etc. By using the absorption panel to eliminate unnecessary sounds, other sounds can be made clearer. can well eliminate indoor reverberation//standing wave/noise and improve the sound clarity of the space. environmentally friendly and harmless, safe to breathe and touch,safe for adults, kids and pets.You can use it with confidence. Note: (with adhesive) - slight color difference Colour:Dark grey Material:Polyester fibers Size:Single side length:about 15cm Package Contents: 12 x Acoustic Panels 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.