This mouthpiece is designed to meet the needs of a player who likes the characteristics of the Monette B4 and B4S mouthpiece. You will be able to choose more options after initial selection. The throat sizes offered are 27, 25, and 23. The 23 throat is recommended for those players who are currently using a Monette Mouthpiece. A Heavy Medium backbore with a #23 throat provides performance most similar to the original. This mouthpiece is usually supplied with a shorter C trumpet shank to be similar in length to the original Monette. Backbores can be ordered here.