[What's Different]The biggest difference with other acoustic foam on the market is that our acoustic foam panels comes with self-adhesive. Are you still worrying about finding tape everywhere? If you ever try our soundproof foam before, you would know how easy to install. [Thicker is Better]Achieve the sound absorption and reflection with our soundproof wall panels, achieving maximum area for the utmost sound control. Easy to shape and cut to size, customizing the shape you like and 't affect performance. [Enhances Sound Quality]3D acoustic design provides moderate sound control on walls or ceilings. High-density materials its tiny particles design which are effective to absorb noise and eliminate echoes. [Easily Cover Large Areas] coverage more quickly! Perfectly suited for small to medium size rooms, recording studios, home theaters, or general sound reduction. Adhesive: Random color, don't accept the specified color Colour:black + gray Material:Polyurethane Size:About 30 x 30 x 5cm Package Contents: 12 x Acoustic Foam Panels 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.