Cup Inner Diameter: 32.9mm Cup Depth: Medium Throat Diameter: 7.9mm Rim: Slightly Flat *This is based on the specifications listed on the sales website, not actual measurements. This is the signature model of jazz player John Sass. Made of stainless steel, it responds very well and is easy to play from top to bottom. The tone itself isn't particularly jazz-specific, but rather has a moderately dark and tight sound. 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