Detail 01
17.43mm (.688 inch) cup diameter
Medium-large for a horn mouthpiece: more lip vibrates, giving a bigger sound with somewhat less high-register security.

Independent shopping perspective
A Schilke 31C2 French horn mouthpiece in silver, with a very thin rim and medium-large cup, for players who want maximum tone volume.

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
Medium-large for a horn mouthpiece: more lip vibrates, giving a bigger sound with somewhat less high-register security.
Detail 02
Puts more lip inside the cup for volume, but concentrates pressure in a narrow band, so endurance suffers on long sessions.
Detail 03
Mid-size bore that balances resistance and airflow rather than favoring either extreme register.
Detail 04
Deeper cup volume darkens the tone and supports the low and middle range more than a shallow cup.
Detail 05
Slightly grippier on the lip than gold, which some players prefer for security, though it can irritate sensitive skin.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
The 30 is the original Farkas with a wide rounded rim and fairly deep cup, built as an all-arounder. The 31C2 has a much thinner rim and larger diameter, trading comfort for volume of tone.
Not really. The very thin rim rewards a developed embouchure. A rounded rim like the 30 or the balanced 29 is easier for a younger player.
No. The larger diameter and medium-large cup favor volume and a full sound. For upper register, a smaller cup and throat like the 28 is the direction to go.
It marks the rim and cup variant within the 31 family: a very thin rim with a medium-large cup, distinct from the standard 31 and the 31B.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.