This is a cup mute for bass trombone. It's a New Stone Lined mute. It's an older item, so the cork is worn and the white paint is dirty. Please check the images for the size and condition. It can still be used. Since I don't have the original box, I will pack it in another box. It will be shipped via Takkyubin (courier service). Bass Trombone Mute Musical Instrument Related Cup Mute