Cup Inner Diameter: 32.0mm Throat Diameter: 7.8mm *This is based on the specifications listed on the sales site, not actual measurements. This model is based on the classic Perantucci PT-64 and was supervised by Daniel Perantoni. Due to a change in the manufacturer, this model is now less common. This item has gold plating on the rim. There are minor scratches on the shank and other areas due to use, but there are no major scratches or dents. Instant purchase is welcome. Price negotiations are also accepted. #Tuba #Mouthpiece #TubaMouthpiece