Self-Adhesive Design - The sound proof Foam panels have double-sided tape behind them.Easy to Install.Just rip down the first layer of double-sided tape,you can paste in wherever you want. High Deformation Rebound Rate - The high resilience of our products is reflected in the fact that when you unpack the product, the product quickly returns to its old appearance. Effective Acoustic Treatment - The sound-absorbing foam is a dense and thick open-cell foam which can well indoor reverberation//standing wave/noise and improve the sound clarity of the space. Environmentally Friendly Materials - Our products are 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. 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. with adhesive backing, the color is random, no designation is accepted Colour:Black Material:Polyurethane Size:30x30x5cm Package Contents: 12 x Sound Proof Foam 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.