Professional Acoustic Treatment - The newly designed shape provides a larger sound absorption area. Therefore, they effectively reduce reverb, flutter echoes, undesirable acoustic reflections, unwanted noises. Sound & - Acoustic foam panels are used to control the reverberation sounds make and this is quite different from soundproofing. it can reduce the in the room, the sound and stereo imaging. Perfectly good for video, audio recording, meeting, podcast, live, music studio, and gaming room. Quick to Normal Size - The soundproof foam comes compressed in a vacuum package, you need to place in a ventilated place for about 2 hours. If part of the acoustic foam can not fully expand, you only need to it in water for 3-5 minutes, ventilate it to dry for about 24 hours, will be to expand to the normal size. Colour:Black Material:Polyurethane Size:about 30 x 30 x 2.5cm Package Contents: 12 x studio foam Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.