Detail 01
16.75mm cup diameter
A middle-of-the-road rim size. Wider than lead-player pieces, so more lip inside the cup and a fuller sound with slightly more effort up high.

Independent shopping perspective
A size 3 silver-plated trumpet mouthpiece with a heavier blank, aimed at players wanting a rich, smooth sound with easy airflow.

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 middle-of-the-road rim size. Wider than lead-player pieces, so more lip inside the cup and a fuller sound with slightly more effort up high.
Detail 02
The narrowest point of the bore. This size lets air through freely without going so open that the sound loses focus.
Detail 03
Moderately wide. Spreads pressure across the lip for endurance, at some cost to flexibility in fast interval jumps.
Detail 04
The taper behind the throat. A barrel shape keeps the sound centered and even rather than spread.
Detail 05
Extra mass around the cup. Heavier mouthpieces feel more solid under the lip and change the response compared to a standard-weight piece.
Detail 06
Standard finish, harder-wearing than raw brass. Some players react to silver; gold plate is the usual alternative.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
A 3: 16.75mm cup diameter, 5.05mm rim width, 3.70mm throat, barrel backbore.
It's a standard trumpet shank, so it fits standard Bb, C and piccolo trumpet receivers. It will not fit cornet or flugelhorn.
Same cup diameter, rim width, throat and backbore. The 3 is described as free blowing with a rich, smooth sound; the 3C leans brighter with more projection.
Neither plays better. Silver is harder and slightly grippier; gold is smoother and a common choice for players whose skin reacts to silver.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.