Sponge, no dust; Sound effects, suitable for studio and KTV, etc.; Square sound-absorbing sponge with beautiful appearance and good acoustic characteristics, its biggest feature is: thanks to its square shape, provides little diffusion, makes you sound more dynamic. It can, for example, combined with other products, consisting of an absorber, the effect is very . Applied to: Studio, piano room, drum room, anchor room, home theater, KTV, meeting rooms, instrument rooms, etc. Color: black + red Material: Polyurethane Size: about 25x25x5cm Package Contents: 24 x Acoustic Foam Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.