Detail 01
The "1" size
Bach numbering runs backward: 1 is the widest rim in the line. More lip area, more air, more work.

Independent shopping perspective
A large-diameter, shallow-cup trumpet mouthpiece in silver plate. For lead and commercial players who already know they want a big rim and a bright top.

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
Bach numbering runs backward: 1 is the widest rim in the line. More lip area, more air, more work.
Detail 02
One of the shallowest cups Bach offers. Brightens the sound and makes high notes speak with less effort.
Detail 03
Grippier and cooler on the lip than gold. Plays in fast, and it will thin at the rim after years.
Detail 04
Bach's stock production line, not hand-fit. You can replace it years later with the same size and feel.
Detail 05
Seats in a standard trumpet receiver. It will not fit cornet or flugelhorn taper.
Detail 06
Normal price for a plated production mouthpiece. Rim size, not price, is what changes your playing here.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. The 1 is the widest rim Bach makes and takes real air support and chops. Students are better served by something in the 5 to 7 range.
Same rim diameter, different cup depth. The C cup is deeper and rounder for a fuller, darker sound. The E is shallow and bright, aimed at lead playing.
No. Trumpet and cornet shanks use different tapers. This is cut for a trumpet receiver.
Eventually, at the rim where your lips sit. Wipe it down after playing and it lasts years. Replating is possible when it goes.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.