Features： High-density design, can effectively block out unwanted noise, eliminate reverb and echoes. Made from environmentally-friendly foam, has great sound absorption, fireproof and burning retarding properties. Wall panels with wide application, perfect for home, studio, theater, cinema, office or other place that need acoustic control, noise reducing and fire . Easy to use, just put them between walls and ceilings, mounting them horizontally is also a good idea. Exquisite workmanship, special wedge design, lightweight and sturdy, a nice choice for you. Specifications： Color: Black Material: Foam Product Size: 48 * 12 * 12cm/ 18.8 * 4.7 * 4.7inch Product Weight: 85g/ 2.9oz (single one) Package Size: 55 * 15 * 15cm/ 21.6 * 5.9 * 5.9inch (single one) Package Weight: 680g/ 23.9oz Package List： 8 * Acoustic Foam