Detail 01
Group II diameters (.674"–.720")
Larger inside diameter than Group I. More lip vibrating means more sound, but it tires you faster if you are not ready.

Independent shopping perspective
Schilke Group II trumpet mouthpiece, 15B, gold plated. Larger diameter with a brilliant B cup, aimed at players who want projection without going shallow.

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
Larger inside diameter than Group I. More lip vibrating means more sound, but it tires you faster if you are not ready.
Detail 02
Smallest diameter in Group II with a B cup — brighter than the standard 15, but same rim footprint.
Detail 03
Medium-small and shallower than a C. More resistance and brilliance, which helps the sound carry over a band.
Detail 04
The standard Schilke throat. Balanced resistance; the 27 models trade openness for high-register feedback.
Detail 05
Smoother and slicker on the lip than silver. Useful if silver irritates your skin, and it wears well.
Detail 06
3 is standard contour. 4 is semi-flat and cushions pressure, which is why the endurance-focused models use it.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Same .674 inch diameter and 26 throat. The 15B has a B style cup, which is shallower and produces a more brilliant sound than the standard 15.
It matters most if silver irritates your lip or you want a slicker feel. Cup depth and rim shape affect your playing far more than plating.
It sits at the small end of Group II. Workable for a strong player, but the larger diameter takes more embouchure control than a typical student size.
It uses the standard trumpet shank so it physically fits. Schilke builds specific models for those horns, like the 16B4 for Eb and the 11Ax for piccolo.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.