Color:Black&Blue Material: foam cotton Size about: 25*25*5cm Package Contents: 12PCS * Acoustic Foam 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. and high quality,Improve vocal clarity,Flutter echoes,Reverberation,Modal issues,Standing waves Mid to High Application:Family noise control(walls,pipes,ceilings,etc.) Waterproof,anti-moisture,good air permeability,Anywhere to help block sound and prevent echoes inside the room 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.)