Yamaha This is Allen Vizzutti's signature model! Compared to Bach, sizes 3-5 are probably the most user-friendly for many people! Lip slurs, etc., should be much easier to perform!! It has a gentle rim shape towards the outer edge of the rim. The outer diameter of the rim feels like it's between a Bach 3 and 5. The cup is a shallow bowl shape, like a Bach E. The throat is 3.56mm. The backbore is similar to a Warburton 7. The shank end thickness is about 0.7mm. The sound is slightly bright, and it's designed to make high notes particularly easy to hit. The large rim, shallow cup, narrow throat, and backbore are designed to allow for lip control from low to high registers, making it suitable for all genres. Trumpet Trumpet Mouthpiece trumpet trumpetmouthpiece