Specifications Material SpongeSize 300X300X50mmDensity 20kg mQuantity 24 PcsColor Red Blue White Black GreyApplied to Studio Piano room Drum room Anchors room Home Theater KTV Meeting rooms Instrument rooms etc Features 1 Soft sponge no dust high density 2 The sound effects suitable for studio and KTV etc 3 Pyramid sound absorbing sponge with beautiful appearance and good acoustic characteristics its greatest feature is due to its pyramid 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 band absorber the effect is very good Note 1 Please allow 1 5mm error 2 Due to the difference between different monitors the picture may not reflect the actual color of the item Thank you 3 The acoustic foam might be pressed by shipping If you receive a foam like this please usea watering can to spray onto the cotton wool if it is Fully folded put it into the water directly and put it under the sun to dry About 12 48 hours then you will see a perfect shape of the foam Any Problem please contact us first thank you for your understanding 4 The compression packing of the product can be restored after a period of time and the compression effect is better without worrying about quality problems Package includes 24 x Soundproof foam