Detail 01
.653 inch cup diameter
Medium size. Enough lip inside for a full sound without the control problems a wider cup brings.

Independent shopping perspective
Silver-plated trumpet mouthpiece, .653 inch cup with a semi-flat number 4 rim. For players who need cushion and endurance across a full rehearsal.

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
Medium size. Enough lip inside for a full sound without the control problems a wider cup brings.
Detail 02
Flatter, wider contact patch spreads pressure over more lip. Trades some flexibility for staying power.
Detail 03
Deeper than the standard 11 cup. Rounder, darker tone; the top of the range takes more work.
Detail 04
Standard bore. Normal resistance — the horn pushes back enough to lean on for stability.
Detail 05
Slick, slightly cool feel on the lip. Can irritate skin if you have a silver sensitivity.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
It works, but the 13 is the more usual student size — larger diameter, rounder rim, quicker response. The 11D4 suits a player who already knows they want cushion.
Same rim family, but the 11D4 has a slightly deeper cup and the number 4 semi-flat rim instead of the standard contour. Darker sound, more endurance.
Not directly. The D cup favors tone and volume. Schilke's A-cup models like the 13A4A are the shallow lead designs.
It wears at the rim over years of playing, and faster if you have acidic perspiration. Wipe it down after playing and it lasts a long time.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.