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. together with the other products, consisting of a wide band absorber, the effect is very good. colour:Red Material:High density flame retardant sponge size:30x30x5cm Package Contents: 1*Soundproof foam Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Sound Stop Absorption Sponge Studio KTV Soundproof~~smart home item Sponge pyramid wall sound insulation material Acoustic Guitar studio sound recording thick absorption studio Board For professional acoustic control, sound dampening, acoustic treatment, noise reduction - Reduce waves, reverb and flutter echoes in smaller to medium sized rooms. Create a great listening or recording environment with the noise reduction products. low cost solution to get better recordings or in the studio. Acoustic panels are used for professional studios, rehearsal rooms, concert , podcasting, churches, home theaters, vocal booths Control noise, , and reverb to create a dynamic sound Applied to: Studio, Piano room, Drum room, Anchor's room, Home Theater, KTV, Meeting rooms, Instrument rooms, etc.