Usage Tips:[Better Sound Absorption] The acoustic panels adopt the pyramid structure shape, forming more rebound grooves, while the thickness of the acoustic foam is 2 inches, which can absorb and consume sound energy to the maximum extent, helps reduce reverb, flutter echoes, undesirable acoustic reflections, unwanted noises.[Polyurethane, SGS Safety Certification] To ensure the acoustic foam panels quality, The sound panels are made of Polyurethane, without adding any other filler materials, our sound foam have passed the SGS safety certification, non-toxic and harmless, to ensure the safety of you and your family use.[Available for Use in Multiple Scenes]The sound foam can be used in small to medium size rooms, theater rooms, recording studios, churches, or offices, etc., reduce unwanted noise and .[Meets U.S. Material Fire Standards]The acoustic foam panels have passed the fire test, open flame contact will automatically extinguish and form a flame retardant layer to prevent further then, minimizing the risk of fire.Colour:WhiteMaterial:PolyurethaneSize:30 x 30 x 5cmPackage Contents:12 x soundproofing foamsOnly 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.