Product Description: 1. The sponge is of high density, soft and dust-free. The sound effects are suitable for studios and KTV. Because of good acoustic characteristics design, it is able to reduce noise and eliminate the echo, a good choice for home studios. 2. It is beautiful in mushroom shape with good acoustic properties, suitable for noise reduction during KTV decoration. Product Parameters: 1. Material: sponge 2. Style: European and American minimalism 3. Applicable Scenes: studios, piano rooms, drum rooms, anchorage chambers, home theaters, KTV, conference rooms, instrumentation rooms, etc. 4. Product Size: about 500 * 500 * 50 mm / 19.7 * 19.7 * 1.97 inches Note: Due to different light and monitor, there may be color differences. Installation Instructions: Paste it after spraying dedicated sponge adhesive, and gently press it. Then, it is done. Packing List: 1 * soundproof sponge