1. Pyramid foam provides moderate sound control or ceiling. Through professional acoustic control, sound suppression, acoustic treatment, and noise reduction, acoustic foam can reduce waves, reverberation and flutter in small and medium-sized rooms. 2. The sound-absorbing board is made of environmentally friendly polyurethane, which not only has effective sound-absorbing properties, but also 't cause any harm to our body. And add flame retardant formula to the sponge to reduce sudden danger and safety. 3. Make higher-quality audio and video recordings, and instantly improve your audio quality by reducing background noise and when recording dubbing, music, interviews, podcasts, or videos. 4. To reduce unwanted noise and , the panel helps to reduce reverberation, flutter , undesirable acoustic reflections, and unwanted noise 5. Very suitable for on-site sound processing on the walls of studios or offices, suitable for recording studios, control rooms, office home studios, home entertainment theaters, and home offices. 6. The size is 30x30x5cm (with certain errors), which is most suitable for small and medium-sized rooms, theater rooms, recording studios, churches or offices. After opening the package, the soundproof cotton, the sound-absorbing board can be placed in a ventilated place for 24-48 hours, and the soundproof cotton board can be pasted. Material:Polyurethane colour:grey Package Contents: 12 * Gray Soundproofing 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.