Describe:Feature:Soft sponge, dust-free;Sound effects, suitable for studios, KTV, etc.;Product application principle: Adopt an open-pored structure, increase sound absorption capacity, optimize internal porosity, reduce interference and reverberation of indoor reflected sound, improve sound purity, adjust indoor sound field and reverberation, and make it sound very comfortable.Specification:Material: SpongeSize: 300x300x25mmQuantity: 24 piecesColor: black/blue/red/purpleApplicable to: home decoration wall, widely used in recording studios, recording studios, visual rooms, visual rooms, piano rooms, tympanum, anchor room, home theater, KTV, soundproof rooms, conference halls, studios, broadcasting rooms, theaters and other occasions Interior decorationPackage Included:24 x acoustic foam