Usage Tips:Rapid Expansion: Our upgrade sound proof foam panels for walls is different from others, our soundproof wall panels use highly elastic materials to their quality. When you open the package, they regenerate within 5 seconds. No need to wait 24 hours, greatly saving your time. Easy to Install: With our sound proof foam panels for walls, you don't need to buy extra glue and double-sided tape. Our sound proof panels for walls has a strong self-adhesive layer. Peel off the kraft paper on the back and press it for 3 to 5 seconds to firmly fix the acoustic panels . 2INCH High-Density soundproof wall panels: The acoustic foam is made of polyurethane foam, with a high density of 20kg/, passing flame retardant requirements, and its size is 2x12x12 inches, which is thicker than other sound absorbing panel. The material can more effectively eliminate echoes, creating an perfect environment for music recording or quiet work. Professional Acoustic Treatment: The soundproof wall panels adopt a unique pyramid 3D acoustic design, which increases the contact area with sound, which means it has better sound absorption effect. The sound proofing for door can reduce noise transmission by increasing noise absorption performance, and can also effectively reduce reverberation, flutter , adverse acoustic reflections, etc. in the room. Multi-Scenario Design: Our sound dampening panels adopt a pyramid design, available in black and gray, easy to cut, and can be designed into different styles according to your preferences. Our acoustic panels sound absorbing are suitable for use in concert , home theaters, game rooms and studios. Colour:Black Material:polyurethane foam Size:30 x 30 x 5cm 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.