Detail 01
10-1/2 rim size
Wider than a 7C rim. Spreads pressure over more lip, which helps endurance but makes upper register work harder.

Independent shopping perspective
Bach 10-1/2C trumpet mouthpiece. A slightly wider cup than the standard 7C, aimed at players who want more comfort on the lip.

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
Wider than a 7C rim. Spreads pressure over more lip, which helps endurance but makes upper register work harder.
Detail 02
Bach's medium cup. Balanced between the brightness of shallow cups and the darkness of deep ones. The all-purpose choice.
Detail 03
A more open backbore. Slightly freer air and a broader sound, at the cost of some resistance players use for control.
Detail 04
Fits Bb and C trumpets. Cornets and flugelhorns use different receivers and need their own mouthpieces.
Detail 05
Standard plating. Wears through at the rim over years of heavy playing and needs replating or replacement.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
The 10-1/2C has a wider rim with the same C cup depth. More lip contact means more comfort and endurance, but the high register takes more work.
Yes, if a 7C feels too small. It is a common band-room alternative and the medium C cup works across concert band, jazz band and lessons.
No. Cornet receivers take a smaller shank. You need a mouthpiece marked for cornet.
Run a mouthpiece brush through it with warm soapy water weekly. Buildup inside the throat narrows the bore and changes how the horn responds.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.