Thank you for viewing. Tuba Mouthpiece Perantucci PT-50 Normal Shank This item is new and unused, having never been taken out of its bag, but the box is not included. It will be carefully packaged with cushioning material and shipped. If you have any questions, please feel free to ask. Cup Diameter: 33.0mm, conical and deep. Rim Width: 7.5mm, sharp on the inside but flat rim. Throat Bore: 8.3mm The PT-50 model is one of the largest conical cup mouthpieces, with an above-average cup size and a sharp inner rim, allowing for clear articulation and tone. It is a mouthpiece that allows for playing passages with a lot of movement and has a fast response. Although it is intended for playing in the low register, it also produces a good sound in the high register.