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.