Detail 01
16.50mm cup diameter
A quarter millimetre narrower than a 3C. Less lip inside the cup, which makes holding the upper register easier.

Independent shopping perspective
Silver-plated trumpet mouthpiece in the common 4C size. Medium cup, rich tone with a strong pitch center and a workable high register. An all-around piece.

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
A quarter millimetre narrower than a 3C. Less lip inside the cup, which makes holding the upper register easier.
Detail 02
Medium rim. Enough cushion to stay comfortable through a long set, narrow enough to keep flexibility between registers.
Detail 03
Standard bore. Gives moderate blowing resistance, so the sound holds a center instead of spreading out.
Detail 04
Straight-walled taper. Focuses tone and stabilises pitch, rather than opening the sound out the way a V backbore does.
Detail 05
Hard, slick surface that wears slowly. Sits cooler and firmer against the lip than bare brass.
Detail 06
Same cup diameter and rim. The 4B blows easier and warmer; the 4C is harmonically richer with a firmer pitch center.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
It works as an all-rounder. Denis Wick's 4B shares the same rim and cup diameter but plays easier, which is the friendlier first step.
The 3C is 0.25mm wider in the cup with a slightly wider rim and a freer blow. The 4C gives up some of that for a stronger center of pitch.
No. This is cut as a trumpet mouthpiece. Cornets use a shorter, narrower shank that won't seat properly in either direction.
Feel changes more than sound. Silver is firmer and slicker under the lip. The cup diameter, throat and backbore do the tonal work.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.