Detail 01
.660" (16.76mm) cup diameter
Small for a flugel. Easier upper register and less air demand, at the cost of low-end breadth and volume.

Independent shopping perspective
Schilke 13F4 flugelhorn mouthpiece, gold-plated. A .660" cup with a narrow number 4 rim for players who want a compact, high-register-friendly flugel setup.

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
Small for a flugel. Easier upper register and less air demand, at the cost of low-end breadth and volume.
Detail 02
If you already play a 13A4a on trumpet, the rim feel carries over so doubling costs you less adjustment.
Detail 03
Semi-flat and relatively wide. Spreads pressure for comfort and gives a firm reference point on the lip.
Detail 04
The standard bore across this flugel series, so sizing choices come down to rim and cup, not resistance.
Detail 05
Tapered for a flugel receiver. It will not seat correctly in a trumpet or cornet leadpipe.
Detail 06
Smoother and slicker on the lip than silver, and a common choice for players whose skin reacts to silver.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. The shank is cut for a flugelhorn receiver and won't seat properly in a trumpet leadpipe. Schilke makes separate trumpet models.
It's smaller: .660" versus .674" for the 15F and .682" for the 17F. Expect an easier high register and a tighter, less broad sound.
Flugel receivers aren't standardized across brands. Check which shank taper your horn requires before ordering, since a mismatch leaves the mouthpiece sitting too deep or too shallow.
It's about feel and skin reaction, not tone. Gold is slicker on the lip and is the option for players who get irritation from silver plating.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.