12Pcs Mushroom Design Acoustic Foam Adhesive Panels Sound Proof Foam Panels 2X12X12inchfor Sound Insulation AbsorbingSelf-adhesive-The soundproof foam panel has a self-adhesive label covering the entire back, which can be easily attached to any surface. No special tools or materials are required for installation. Easy to shape and cut, modification will not affect performanceReduce noise-The 2-inch foam-designed acoustic panel reduces the wave amplitude by increasing air resistance and absorbing sound. Can effectively control the intermediate frequency and high frequency. Quickly expand-12 packs/sets, each is 11.8X 11.8X 1.97 inches (about 30 X 30X 5 cm) thick. The soundproof foam is compressed by vacuum packaging and placed in a well-ventilated place. It can quickly return to normal size in about 24-72 hours. Flame Retardant Environmentally Friendly-Sound insulation foam is flame retardant, preventing fire from spreading and reducing strength. The production material does not contain formaldehyde and is very non-toxic. It is also durable and the design is durableWidely used: It is very suitable for live therapy sound on the wall of studio or office, recording studio, control room, office home studio, home entertainment theater, meeting room, baby room, etc. Note: The color of the adhesive is random and cannot be selectedMaterial:Polyurethanecolour:BlackPackage Contents:12 x Acoustic Foam Adhesive PanelsOnly the above package content, other products are not included. Note: L