willie's Custom Brass Willie's Trombone Mouthpiece Apollo Series Large Tenor APOLLO Series (727☆)

Modern American symphonic model. Full specs required for a principal player of a modern orchestra. Supervisor: Hiroki Sato (Principal player of Tokyo City Philharmonic Orchestra) Rim diameter 27.27 (mm) Throat diameter 7.10 (mm) Regular cup Approximate size of other companies: 1-1/2G