willie's Custom Brass Willie's Trombone Mouthpiece K2 Series Large Bore SP Finish (6-1/2AL)

A long-awaited standard spec mouthpiece for orchestra and wind band players, completed after four years of testing with trombonist Kyoichiro Gun of the Siena Wind Orchestra. Supervisor: Kyoichiro Gun (Siena Wind Orchestra) SP finish, rim diameter 25.40 (mm), throat diameter 6.70 (mm), similar to other companies' sizes: Buck 6-1/2AL U cup