This is a warm-up mute for trombone. I am selling it because I have no opportunity to use it. It has a moderate resistance and is ideal for playing in the wings of a stage or at home. It is lightweight and does not interfere with practice, and the pitch is also relatively natural. There are no major dents, but there are some minor scratches. I think they can be cleaned with a fine-grained polishing compound, but I will hand it over as it is. - Brand: Best Brass - Type: For trombone / trombone / (According to the manufacturer's website, it can also be used for flugelhorn) - Material: Aluminum I will use recycled packing materials. I usually ship the next day, but it may take a few days depending on work or other circumstances. Please let me know if you are in a hurry.