Description 4Pcs 30x305cm Square Insulation Reduce Noise Sponge Foam Cotton Specification Material nvironmentally polyurethane foamColor red blackSize 30x30cmThickness 5cmFeatures Suitable for sound recording studio listening room home theater KTV and all kinds of public places The sponge is the ideal sound insulation sound absorbing heat insulation material Sound absorbing sponge is on the basis of sponge for further processing acoustic inside the spongeand reflection of the increase in the number so as to achieve the noise sound absorbing effect Package Included 2 Red Insulation Reduce Noise Sponge2 Black Insulation Reduce Noise SpongeMore Details