Vandoren has developed the “13 series” mouthpiece specifically for American clarinetists using A440 pitch.
Four models have been originally developed with specific facings to this series:
The M13, M13 Lyre, M15 and M30 mouthpieces.
The “13 series” range also encompasses other models (traditional facings):
5RV, 5RV Lyre, B45, B40, B40 Lyre and M30 Lyre.