Thank you for viewing. This is a used Okura Mute practice mute for trombone, in excellent condition. It was test-played once and then stored. It is not compatible with bass trombone. (Comes with box and resistance adjustment pipe) [Product Description] - Redesigned in September 2016! - Color is now only black. ♪ Suppresses unwanted vibrations and cuts unevenness in sound. ♪ The body can be opened and closed to keep the inside clean. ♪ Choose from two sizes of air holes. Practice is possible by utilizing the difference in resistance. Practice mutes tend to focus on soundproofing performance and good playing feel. However, the most important thing is the comfort of the sound you hear. In 2013, the handmade practice mute "okura+mute" was born, which does not compromise playing technique and has the potential to help improve. It quickly reached the hands of players around the world, and inquiries from all over the world continue to pour in. The new okura+mute was completed with the desire to have more players experience it. The okura+mute has excellent soundproofing and a comfortable feel that makes you want to keep playing. *Please understand that this is a used item.