Suitable for sound recording studio, listening room, home theater, KTV,and all kinds of public places.The sponge is the Perfect sound insulation, sound-absorbing, heat insulation materialSound-absorbing sponge is on the basis of sponge for further processing, acoustic inside the sponge and reflection of the increase in the number so as to achieve the noise, sound-absorbing effect.Produced by environmentally polyurethane foam.In order to improve the opening steps and specific acoustic characteristics, make it not only has the sound absorption characteristics effectively, without any harm to human bodyName: 4 Tiles Acoustic Foam Panels Sound Treatment Convoluted Egg ProfileMaterial: FoamColor:BlackSize:40cm x 30cmThickness:2cmPacking included: 6 x FoamOnly the above package content, other products are not included.Note: Light 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.