Usage Tips: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 unnecessary sounds, other sounds can be made clearer. Can well indoor reverberation//standing wave/noise and improve the sound clarity of the space. Made of polyester fiber material, which is environmentally friendly and harmless, safe to breathe and touch,safe for adults, kids and pets.You can use it with confidence. size: 30 x 30 x 5cm Material: Polyester colour: grey+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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.