Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si 3D ACOUSTIC DESIGN: Our 2 inches foam provides moderate sound control on walls or ceilings. Perfect for individuals to reduce and absorb unwanted echoes, waves, reverb and flutter echoes. Made with 100% Polyester Fiber, Retardant, it is both safe to in and Press, making it great for any location in the home or studio, it's safe for adults, kids, and pets! Great for spot treating sound on walls in your studio or office - For in recording studios, control rooms, Offices home studios, home entertainment theaters, Home Offices. Easy to shape and cut to size, altering won't affect performance. The package is vacuum sealed for shipping. The first glance you see the foam is of deformation, but pls do not worry about this. Just unpack the package in time and put in a ventilated place for 24-48 hours to restore normal shape. our acoustic foam panels are an Perfect option for absorbing flutter echoes, standing waves and reverberation or unwanted medium-to-high frequencies of sound. Widely used in home or professional studio, home theater, control room, instrument studio, ktv, bar, vocal booth, church, meeting room, podcast studio, etc. Colour:Black + Purple Material:Polyurethane Size:30x30x5cm Package Contents: 12* Acoustic Panels Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.