and high quality,Improve vocal clarity,Flutter echoes,Reverberation, issues,Standing waves Mid to HighWaterproof,anti-moisture,good permeability,Anywhere to help block sound and prevent echoes inside the roomApplication:Family noise control(walls,pipes,ceilings,etc.)Workplace noise control(light walls,partitions,conference rooms,etc.)Entertainment noise control(KTV rooms,walls,ceilings,floors,etc.)Industrial noise control(factory walls,roofs,equipment,doors,control room,etc.)Color:Black&BlueMaterial: foam cottonSize about: 25*25*5cmPackage Contents:12PCS * Acoustic FoamOnly 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.