Marcinkiewicz H2 mouthpiece. Purchased from a German music store. I loved the bright sound and good microphone response, and used it frequently for recordings. However, I am selling it because I have sold the instrument I used it with. I have handled it with care, so it has few scratches and is in good condition. Rim inner diameter: 33.6mm, Throat: 8.33mm American shank #Tuba Mouthpiece #Tuba #Tuba