[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 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- and harmless, to 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 . Colour:White Material:Polyurethane Size:30 x 30 x 5cm Package Contents: 60 x soundproofing foams Only the above package content, other products are not included. Note: Light reflection 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.