Detail 01
16.5mm cup diameter
Between the 4 and the 3 in this line. Wider than a 5, so more lip vibrates and low notes speak easily.

Independent shopping perspective
Denis Wick Classic 4B for cornet: 16.5mm cup, tight 4.27mm throat, V backbore, silver finish. For players chasing clarity and a compact 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
Between the 4 and the 3 in this line. Wider than a 5, so more lip vibrates and low notes speak easily.
Detail 02
Narrower than the 4 and 4.5 at 4.58mm. More resistance, which aids control and endurance but takes more air at volume.
Detail 03
The traditional cornet taper. Darker and more compact than the open backbore on the plain 2, 3 and 4.
Detail 04
Mid-width. The 4BW's 5.5mm rim spreads pressure over more lip; this one keeps a more defined edge and better articulation feel.
Detail 05
Slicker on the lip than bare brass. Plating wears through over years, but a worn piece can be replated rather than replaced.
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, which is shorter and differently tapered than a trumpet shank. It won't seat in a trumpet receiver.
The 4 has a 16.4mm cup, 5.27mm rim, 4.58mm throat and open backbore. The 4B is slightly wider at 16.5mm with a tighter 4.27mm throat and a V backbore.
That's its strength. The tighter throat and V backbore give clarity and resonance across the range, including the upper register.
What most players notice is feel — silver is slicker and cooler on the lip than bare brass. Cup, throat and backbore dimensions do the real work.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.