Produced by environmentally polyurethane foam.In order to improve the opening steps and specific acoustic characteristics, make it not only has the sound absorption characteristics effectively, without any harm to human body  

 The sound-absorbing foam brick has beautiful appearance and good sound-absorbing performance. Its biggest feature is: because the wavy triangle shape spreads very little, it makes your voice more dynamic.  
 Polyurethane is an ideal material for sound insulation, sound absorption and heat insulation. The sound-absorbing sponge is further processed on the basis of the sponge to increase the number of sound absorption and reflection inside the sponge, so as to achieve the effects of sound insulation, sound absorption and sound absorption. Absorption.  
 It is suitable for various public places such as recording studio, listening room, home theater, KTV and so on. Used to absorb medium and high frequencies and reduce echo. Overall noise reduction coefficient. Color: Black Total Size: 30 * 30 *2.5cm (12"*12"*1") Package include: 48PACK  
 Compress the packaging.High quality products.Open the package for quick recovery.6 to 12 hours.