Features: Soft sponge, no dust, high density; 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. Applied to: Studio, Piano room, Drum room, Anchor's room, Home Theater, KTV, Meeting rooms, Instrument rooms, etc. Specifications: Material: Sponge Size: 30 x 30cm/ 12 x 12inch Quantity: 10Pcs Color: As the picture show