Model Number : 4PCSis_customized : YesMaterial : spongeSize : 15x15x15cmCertification : NONEType : Sealing StripsDensity : highKind Reminder: Our product is compressed and vacuum-sealed. It may be deformed due to transportation. It only needs to be washed and dried to return to its original state!!! If you are concerned about product distortion, please do not purchase this product.feature:-Soft sponge, dust-free,High density, flame retardant;-Sound effects, suitable for studios and KTV, etc;Product application principle: Use the open-pored structure to increase its sound absorption capacity and optimize its internal porosity, reduce the interference and reverberation of indoor reflected sound, improve the purity of the sound, adjust the indoor sound field and reverberation, and make the sound pleasant to the ears.specification:Material: spongeSize: 150x150x150mmApplicable to: Home decoration wall, widely used in recording studios, recording studios, audio-visual rooms, audio-visual rooms, piano rooms, drum rooms, anchor rooms, home theaters, KTV, soundproof rooms, conference halls, studios, broadcasting rooms, theaters, etc. Interior decoration of the occasionPackage Included:4 x acoustic foam