Detail 01
3C rim
Same rim designation as Bach's 3C trumpet piece, so the feel on the lips carries over when you switch horns mid-set.

Independent shopping perspective
Bach 3C flugelhorn mouthpiece. For trumpet players doubling on flugel who want a familiar rim and a proper flugel cup.

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
Same rim designation as Bach's 3C trumpet piece, so the feel on the lips carries over when you switch horns mid-set.
Detail 02
Deeper and more conical than a trumpet cup. This is what produces the warm, covered flugel sound rather than a bright one.
Detail 03
Cut for a flugel receiver. A trumpet mouthpiece in a flugel sits wrong and kills both intonation and tone.
Detail 04
Bach's medium cup depth within a given rim size. A middle-ground choice rather than an extreme in either direction.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. The shank is a different taper and won't seat properly, and the deep cup would wreck the trumpet's response and intonation even if it did.
Flugelhorn receivers aren't fully standardized. Most modern flugels take this taper, but older or European instruments may need a different shank or an adapter sleeve.
Yes, that's the point of matching numbers. The rim feel stays familiar so the switch costs you nothing, while the cup gives you the flugel sound.
The deeper cup trades upper-register security for warmth. That's the instrument's design, not a fault. Flugel parts are usually written lower for this reason.