Acoustic foam is used to remove reverberation and sound reflections, provide sound insulation, which is suitable for sound studios. durable, soft, non-toxic, and long time to use. It also reduces slap-back and room ring when used in medium-sized areas like isolation booths, recording booths, sound studios, etc. Acoustic foam is suitable for walls, ceilings and doors and other various places such as theaters, recording studios, gyms, subways, kindergarten,it is also a perfect decoration. colour:Silver grey Material:Polyester fiber size:30cm*30cm*9mm Package Contents: 12*Sound absorbing panels 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.