[What's different] the biggest difference from other acoustic foam on the market is that our acoustic foam panels comes with self-adhesive. Still worried about finding tape everywhere? If you ever try our sound absorbing foam before, you will know how easy it is to install. [Thicker is better] achieve sound absorption and reflection, with our 2-inch thick pyramid-shaped, soundproof wall panels, achieve maximum surface area in case of sound control as much as possible. Easy to shape and cut to size, customizing the shape you like and won't affect the output. [Improves sound quality] 2 inch pyramid 3D acoustic design provides moderate sound control on walls or ceilings. High-density materials are small particles that effectively absorb noise and eliminate echoes. [Easy Coverage of Large Areas] 12 packs cover 12 square feet--Each tile is 1 square foot with a thickness of 2 inches. Get more reach faster! It's perfect for small to medium-sized rooms, recording studios, home theater, or general audio reduction. Size: 30x30x5cm Material: Polyurethane Color: Black Package Content: 12 * Foam StudioOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.