Used as a speaker stand to clarify the sound. I've been using it for about 10 years, but I ended up buying a different stand, so I'm selling this one. The condition of the sponge-like material is as shown in the photos. I brushed off the dust. You can search for my information by searching for "Imanjy" to your satisfaction. https://youtube.com/@imanjymusic Market price is around ¥5,000. It's made by a company called Auralex, and I bought it in America. At a music store called Guitar Center in Los Angeles. So I didn't buy it in Japan. But I don't think it makes any difference, but I'd like to mention where I bought it. Sound House product page https://www.soundhouse.co.jp/products/detail/item/7518/ You can refer to this page for detailed usage instructions. As for the sound, it was a safe sound. If I were asked how it compares to not using it, there's no dramatic change, but the sound image might be a little clearer. This is because you can't really feel the benefits of this kind of product unless you're in a soundproof environment, so I recommend buying it as a kind of good luck charm. By the way, during the time I used it, I didn't feel that the sound deteriorated because it got old, so I think it still has the same effect in this condition. There is no strict measurement data, so please read this text as a kind of good luck charm! Imanjy