Feature:1. The acoustic foam has sound quality perfection, acoustic diffusion, and reverberation reduction function.2. Wedged design ensures excellent sound absorption effect, making it an pretty decoration on wall.3. Made of premium flame retardant material, the acoustic foam is nonflammable, safe and reliable.4. Allows for wide application in studio, control room, home, home theatre, office and so on.5. Very convenient to install, and you can choose to use stickers or acoustic foam spray glue to fix it.Specification:Item Type: Acoustic FoamProduct Size: Approx. 30 x 30 x 5cm / 11.8 x 11.8 x 2inProduct Material: PolyurethaneProduct Function: Perfect sound quality, acoustic diffusion, decoration. Scope of Application: Recording studio, control room, home studio, home theatre and office. Packing Method: Compressed and packed. .Package List:48 x Acoustic FoamNote:1. After opening the vacuum package, if the rebound effect is not good, soak it in water for 13 minutes, wring it out gently, and then place it in a ventilated place to air dry or blow dry with a hair dryer. This method can make the soundproof foam rebound faster and more neatly; 2. Lightcoloured soundabsorbing foam is prone to oxidation and discolouration, but it does not affect the function and quality. Please purchase with caution. 3. The product does not include stickers and soundproof foam spray glue.