Features: -Soft sponge, no dust, high density; -The sound effects, suitable for studio and KTV etc; -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. Specifications: Material:Sponge; Size:300x300x50mm; Color:Black/Blue/Yellow/Grey/Red/Coffee; Weight:50g; Applied to:Studio, Piano room, Drum room, Anchor's room, Home Theater, KTV, Meeting rooms, Instrument rooms, etc. Note: Please allow 1-5mm error. Please make a note to us if you want the certain color of this product. Or we will send this product at random color. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Included: 1x Soundproof foam