I would stay away from the yamaha mouthpieces - when i was in high school my teacher made us play these ( no matter what type of horn ) and the band sounded horrible ,plus they are very easy to crack/chip if you are not careful and that is not good for students. and after the year was over people had to buy 2 or 3 because they got damaged so quickly
I would look into the new vandoren " V5" mouthpieces they are not that expensive and are good quality
I would look into the new vandoren " V5" mouthpieces they are not that expensive and are good quality