Tom Crown Bass Trombone Straight Mute Aluminum Tom Crown mutes are used worldwide. They have a clear and distinct tone. The resonance, especially at ff (fortissimo), is overwhelming, and they are reputed to be suitable for contemporary music. This is a cup mute with a brilliant tone. *For bass trombone ○ Condition: Only used for testing, unused. There are a few scratches. They may have been made during testing. Please check the images. Otherwise, there are no noticeable stains or damage, and it is in good condition. I apologize if I missed anything. ○ I bought it for my child, but they didn't use it. Please understand that this is a home-stored item before purchasing. ○ When shipping, I will pack it compactly. Please forgive any creases. ○ The actual color may differ slightly from the photos due to the shooting environment. Thank you for viewing. Thank you.