This is a Miraphone Tu43 tuba mouthpiece. A German friend sent me several, saying that a mouthpiece with the same rim diameter and throat diameter as the Tilz WH-B2, with good response and controllable high and low notes, had been released. However, one is enough for me, so I am offering a new, unused one for sale. I took it out of the box for the first time to take these photos. Inner rim diameter: 33mm Throat: 8.9mm European shank New price: 127 euros (from the Miraphone website) #tubamouthpiece #tuba #tuba