Blessing MPC11CTRB 11C Trombone MouthpieceBlessing MPC11CTRB 11C Trombone MouthpieceSmall Bore Also used for BaritoneA secondary option for a beginning student, the 11C plays like a smaller 6. 5AL and brighter than a 12C. It offers a medium shallow up and medium wide rim which gives extra support and comfort for the player at any level. Your mouthpiece plays a significant role in the sound production on a wind instrument. Your connection to the mouthpiece is personal. The sound on a brass