Detail 01
17mm cup diameter
The widest in this cornet range. More lip vibrates, so the sound gets bigger but the top end takes more work.

Independent shopping perspective
Cornet mouthpiece in the size 2 — the largest cup in this range, open backbore, aimed at players who want a broad, free-blowing sound.

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
The widest in this cornet range. More lip vibrates, so the sound gets bigger but the top end takes more work.
Detail 02
The narrowest rim here. Concentrates pressure on a small area — flexible and responsive, but tiring over long sets.
Detail 03
The most open throat in the range. Takes plenty of air and gives less resistance to lean on.
Detail 04
Free-blowing and broad rather than compressed. The V-type backbore on the 2B narrows the same cup for more high-register clarity.
Detail 05
Standard slick finish. Worth avoiding if you have a silver sensitivity.
Detail 06
The cornet shank is shorter and tapers differently. It will not seat correctly in a trumpet receiver.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. This is a cornet mouthpiece with a cornet shank. It will not seat properly in a trumpet receiver.
The 2 is larger and more open: 17mm cup vs 16.4mm, and a narrower 4.92mm rim vs 5.27mm. The 4 gives a deeper, richer tone with a steadier pitch center.
Same 17mm cup and 4.92mm rim. The 2B uses a V-type backbore and a tighter 4.27mm throat, trading free-blowing openness for high-register clarity.
No — the 4.92mm rim is the narrowest here, so pressure concentrates. For endurance, the wider rims on the 4W, 2BW, or 4BW are the ones to look at.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.