Soft sponge, dust-free, high density.The square sound-absorbing sponge has beautiful appearance and good acoustic properties.Ideal for controlling sound reflections in small rooms.By effectively controlling unwanted reverberation and echo, you can have a more pleasant sound.Suitable for recording studios, control rooms, offices, vocal studios, etc.Home noise control (walls, pipes, ceilings, etc.)Entertainment noise control (KTV room, wall, ceiling, floor, etc.)Noise control in the workplace (light walls, partitions, meeting rooms, etc.)Colour: silver-grayMaterial: polyester fiber cottonSize: Side length 17.5cmPacking:12*Sound-absorbing boardPlease understand that due to differences in lighting or computer monitors, I cannot guarantee that the photos and actual colors are 100% the same.Due to different measurement methods, there may be a deviation of 1-2cm.Note: Light shooting 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.