Detail 01
Schilke 69C4 equivalent
Rim and cup are matched to that size, so if you've played a 69C4 the feel carries over directly.

Independent shopping perspective
Yamaha's standard tuba mouthpiece in the 68B size, matched to a Schilke 69C4. A step up from an unmarked stock mouthpiece.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
Rim and cup are matched to that size, so if you've played a 69C4 the feel carries over directly.
Detail 02
You can move a size at a time within one family instead of relearning another brand's rim shape.
Detail 03
If the 68B feels small or thin on a big BBb, the 66 is the wider, deeper step in the same range.
Detail 04
The 68B is not the F tuba option. Doubling players usually want a separate, shallower mouthpiece for F.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
A Schilke 69C4. Yamaha lists it as the direct size match in their standard tuba range.
The 66 is the Schilke Helleburg match — larger and deeper. The 68B is the smaller 69C4 size. The 66B is a Helleburg with a shallower cup.
No. It's the mouthpiece by itself.
The 65. The 64 is a Bach 25 with a smaller rim diameter, and the 67 matches a Bach 22.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.