Bb Clarinet Mouthpieces Boehm system Vandoren СМ40018 M30 Lyre "13 Series" with beak versions Profile 88. It guarantees flexibility and roundness of sound. This mouthpiece has an exceptional quality of sound.
The “13 series” mouthpiece was developed specifically for American clarinetists using A440 pitch.
A=440. The Beak: Profile 88. Tip Opening: 113.5 (1/100mm). Long Facing. Works best with Vandoren #3-#4 Reeds.