Offers rich orchestral sound with a powerful projection. The rim and cup are fairly large for comfortable fortissimo, yet the mouthpiece also offers fine control for the most dedicated passages. Designed by Pittsburgh Symphony principal trombonist Peter Sullivan. This model is included with Yamaha's new Xeno line of large bore orchestral trombones. Silver plated. -Yamaha/cdp • 25.42mm cup diameter • Semi-deep cup • 7.15mm throat • Semi-wide backbore