Upgrade Strong Self-adhesive Panels - Our sound proof foam panels comes with its own adhesive glue. Tear off the double-sided tape on the back. The installation can be completed within a few seconds without additional adhesive tape, and it will not fall off easily after a long time. Fast Recovery - The high elastic material of soundproof wall panels makes it only need to wait 2 seconds after being unpacked, the soundproof wall panels will expand to the shape, no need to soak in water and wait, so that you can get the soundproof wall panels after faster use. Professional Sound Absorption - Our acoustic panels are made of higher density materials, and the new 2-inch thick groove design increases the sound contact area and frequency of the acoustic panels, so it has better sound absorption effect, effective reduction of reverberation, chatter and external noise. Wide Applications - Acoustic panels are not only suitable for recording studios, offices, home theaters and game rooms, but can also be installed on walls, doors, ceilings, etc. Acoustic panels can be easily cut to your desired size without compromising the performance of the acoustic panels. Colour:black Material:Polyurethane Size:300 x 300 x 50mm 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.