Cup Inner Diameter: 32.5mm Cup Depth: Medium Throat Diameter: 8.2mm Rim: Slightly Rounded *This is based on the specifications listed on the sales website, not actual measurements. The Breslmair TB2 is an all-around mouthpiece with an average size, making it easy to match with any instrument. I think it has a rich sound and is easy to create resonance with. It is also rarely imported, so why not try it out on this occasion? There are fine scratches on the shank, etc., due to use, but there are no major scratches or dents. Instant purchase is welcome. Price negotiations are also accepted. #Tuba #Mouthpiece #TubaMouthpiece