[-friendly Material]Sound proof foam panels are made of environmentally high density polyurethane foam, fire retardant and non-toxic. Professional sound-absorbing foam, safe to use. Please note that the white insulation foam will oxidize over time. [Widely Usage ]These studio absorbing foam widely use , office, recording studio, ceiling, movie theaters, gaming room, vocal booths, control room. No disturbing from each other! [Easy to Install ]It can be installed on walls, ceiling, doors and window. No tools required and no damage. You can cut the size as you wish, which will not affect its performance. [Perfect Sound Absorbing Performance] For professional recording, videos, and game live streams, these are . Acoustic foam is used to eliminate reverberation and sound reflection, professional studio grade acoustical treatments, attenuate the and outside noise, allows the audience can hear more clearly. Colour: gray Material: polyurethane Size: 30x30x2.5cm Package Contents: 24 * 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.