Detail 01
16.75mm cup diameter
Mid-size for a cornet. Enough room for low notes without the lip work a 17mm rim demands.

Independent shopping perspective
Silver-plated cornet mouthpiece, 16.75mm cup with a V-shaped backbore and tight throat. Built for players who want a focused, brilliant top end.

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
Mid-size for a cornet. Enough room for low notes without the lip work a 17mm rim demands.
Detail 02
Narrows the air column behind the cup. Sharpens the core of the sound and adds edge over an open backbore.
Detail 03
Tighter than the 4.572mm throat on the open-backbore models. More back-pressure, more control, less raw volume.
Detail 04
Middle-of-the-road rim. Less cushion than the 5.5mm wide models, so it flexes quickly but fatigues sooner.
Detail 05
Slightly grippier on the lip than gold and easy to keep clean. Plating wears at the rim over years of playing.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Same 16.75mm cup diameter and 5.05mm rim. The 3B uses a V-type backbore and a tighter 4.27mm throat, so it plays more focused and brilliant than the darker, free-blowing 3.
No. Cornet and trumpet shanks are different sizes, so it won't seat properly in a trumpet receiver.
It's a specific choice, not a general upgrade. Pick it if you want a tighter, brighter high register. If you want more openness and warmth, look at the open-backbore models.
The V backbore and 4.27mm throat focus the sound up top, which makes the register easier to center. It won't add range you haven't built.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.