Schilke makes a wide variety and large number of stock mouthpieces, all of which are included the chart below. They are readily available and are remarkably inexpensive given their consistency and quality.
Model
mm
inches
Throat
Description
Shank
62
31.85
1.254
21/64 (.3281")
A superior standard mouthpiece with a good centered sound and easy response in the high and low register with good intonation. Also recommended for Eb or F tuba.
66
31.52
1.241
21/64 (.3281")
Designed from the original Helleberg, this mouthpiece offers a smaller inside cup diameter but still produces a rich tone quality with a wealth of volume.
67
32.41
1.276
21/64 (.3281")
Similar to the "SH" model, but slightly larger. The contour is also similar to the #66 but offers improved tonal response.
69C4
32.76
1.290
M (.295")
With a very comfortable wide rim and cup that is not too deep, the 69C4 offers an excellent characteristic sound and facilitates all registers of the instrument.
SH
31.84
1.253
21/64 (.3281")
This "Schilke – Helleberg" model offers a rim contour that is different from our #66. This mouthpiece produces a sound that is clear and dark.