Detail 01
.675 inch cup diameter
Sits just above the 30 at .670 and below the 31B at .687. Small diameter steps change feel noticeably.

Independent shopping perspective
Silver-plated French horn mouthpiece. V-shaped cup, .675-inch diameter, .185 throat and a thicker rim, built to produce a greater volume of sound.

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
Sits just above the 30 at .670 and below the 31B at .687. Small diameter steps change feel noticeably.
Detail 02
A funnel taper rather than a bowl. Blows deeper and rounder, and rewards consistent air support.
Detail 03
More open than the 30's .173, well short of the 32's .221. Moderately free-blowing without going wide.
Detail 04
More contact area on the lip. Spreads pressure over long sessions, at the cost of a sharper articulation edge.
Detail 05
The B uses a wider rim with a higher center point and a medium-depth bowl cup instead of the V.
Detail 06
Standard plating over brass. Easy to clean and slow to wear, though the rim shows use over years.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
The 30 is the original Farkas model at .670 inch with a wide rounded rim and fairly deep cup. The 31 is slightly larger at .675 inch, with a V cup and thicker rim for more volume.
It tapers like a funnel instead of a bowl. That gives a deeper, rounder blow and works with the .185 throat to move a larger volume of sound.
It is built around volume of sound with a thicker rim. Players wanting a broadly balanced option often look at the 29 or the Farkas-style 30 instead.
The 28 is the model recommended for descant, with a small cup and throat that favor the high register. The 31 is a larger, more open piece.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.