Detail 01
0.677 in. (17.20 mm) inside cup diameter
On the narrower side of common sizes. Supports endurance and altitude more than broad, open sound.

Independent shopping perspective
Marcinkiewicz 300 Series 315 trumpet mouthpiece. Narrow-ish 0.677 in. rim, shallow cup, tight throat — built for lead playing and upper-register endurance.

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
On the narrower side of common sizes. Supports endurance and altitude more than broad, open sound.
Detail 02
Shallow. Brightens the tone, speeds articulation, makes high notes sit closer to the surface.
Detail 03
Rounded contour without a bite. Comfortable for long sets, still gives enough grip for control.
Detail 04
Tight throat. Adds resistance, which many lead players use to hold notes together up top.
Detail 05
Conventional length, so your horn's intonation tendencies stay where you expect them.
Detail 06
Standard trumpet shank profile — fits normal receivers and standard mouthpiece storage.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Both list identical dimensions — 0.677 in. rim, 0.429 in. cup, 0.144 in. throat. Contact us to confirm the intended difference before ordering.
Yes. The shallow cup, narrower rim and tight 0.144 in. throat all point toward lead and commercial playing rather than orchestral work.
Possibly. Any mouthpiece change resets muscle habits. Most players need two to four weeks of regular playing before comparing fairly.
Yes. It uses a standard trumpet shank with a 1.081 in. outside diameter and 3.450 in. length, so it seats normally in typical receivers.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.