This is a BEST BRASS warm-up mute. This is the older model. I compared the new and old models at the store, and I felt that the older model had a better resonance, so I bought this one. After that, I no longer needed to use a mute, so I'm offering it to someone who can use it. During use, I dropped it 2-3 times, and there are some dents. There are also scratches on the body. I think neither of these will affect its use, but please be aware that it has these scratches. It doesn't have the original box, so I will ship it in another box. Please consider it.