Sound Proof Cotton Acoustic Foam Stop Absorption Sponge Studio Ktv Soundproof Specifications: Material: Sponge Size: 25x25x5cm Applied to: Studio Piano room Drum room Anchor s room Home Theater KTV Meeting rooms Instrument rooms etc. soft sponge no dust high density; The sound effects suitable for studio and KTV etc; 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: Please allow 1-5mm error. Due to the difference between different monitors the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Soundproof foam