Detail 01
.690 in. (17.52mm) cup diameter
A large rim. More room for the lip to vibrate, fuller low register, but it asks for more endurance.

Independent shopping perspective
Gold-plated Schilke flugelhorn mouthpiece, 18F size. For flugelhorn players who already know they want a fairly large rim and a dedicated flugel piece.

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
A large rim. More room for the lip to vibrate, fuller low register, but it asks for more endurance.
Detail 02
If you play an 18 on trumpet, the rim feel carries over, so switching horns mid-set is less jarring.
Detail 03
The standard bore across this flugel series. Consistent blow resistance if you try other sizes in the line.
Detail 04
Softer, warmer feel on the lip than silver, and it sidesteps nickel reactions. Wears through faster with heavy use.
Detail 05
Cut for a flugel receiver only. Trumpet and cornet mouthpieces are not interchangeable with it.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. It is cut for a flugelhorn receiver. Trumpet mouthpieces use a different taper and the two are not interchangeable.
The 18F is larger: .690 in. versus .682 in. cup diameter. Both use a 24 throat, so the difference you feel is rim width, not blow resistance.
It matters if silver plating irritates your lip. Otherwise it is a feel preference — slightly slicker and warmer on contact. It does not change the pitch or projection.
If you are moving up from a smaller rim, expect the low register to open up and your endurance to dip at first. Ease into it rather than switching before a gig.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.