Bb Clarinet Mouthpieces Boehm system Vandoren СМ4078 B40 "13 Series" with beak version Profile 88. The mouthpiece produces a compact and centered sound.
The “13 series” mouthpiece was developed specifically for American clarinetists using A440 pitch.
A=440. The Beak: Profile 88. Tip Opening: 119.5 (1/100mm). Medium Long Facing. Works best with Vandoren #2 - #3,5 Reeds.