Certification : NONESize : 300x300x50mmModel Number : 12/24pcsType : Sealing Stripsis_customized : YesMaterial : foamDensity : OrdinaryNOTE: Dear buyer, hoping can attract your attention. Because of the large volume and quantity of this product, we ship it in compressed packaging. Compression packaging may cause you to find that the product becomes thin and wrinkled when you receive it. Please do not misunderstand that our products have quality problems. This is a normal phenomenon caused by compression. Just leave it in the air for a few days, or wash it with water and dry it, and it will quickly restore its original shape. Thank you for your understanding. If you have any questions about the product, please send us a message first. We are always there to ensure the best service.Features:-Soft sponge, no dust,;-The sound effects, suitable for studio and KTV etc;-Square sound-absorbing sponge with beautiful appearance and good acoustic characteristics, its greatest feature is: due to its square shape, it provides little diffusion, it makes you sound more dynamic. It may, for example BASSTRAP combined together with the other products, consisting of a wide absorber, the effect is very good.Specifications:Material: SpongeSize: 300x300x50mmQuantity: 12/24PcsColor: BlackApplied to: Studio, Piano room, Drum room, Anchor's room, Home Theater, KTV, Meeting rooms, Instrument rooms, etc.Package Included:12/24 x Soundproof foamsThe product is produced by foaming in batches, there will be slight color difference, and 100% no color difference cannot be guaranteed.