This is a Perantucci tuba mouthpiece. I used it a few times after purchasing it, but I no longer use it, so I am selling it. Please assess the condition from the photos. The following is product information from the Japan Tuba Center website: PT-88 Cup Characteristics Diameter: 33.5mm, large and deep hemispherical shape with a very rounded bottom. Rim Characteristics Width: 7.0mm, rounded inner and outer rims. Throat Bore: 8.1mm The PT88 model was originally designed for the low register. However, it was found to be suitable for medium-large and large-bore CC tubas as well. It works well with any CC or BB♭ tuba, producing a powerful sound with good volume. Recommended for advanced players.