Detail 01
16.87mm rim inner diameter
Middle of the standard range. Enough room for low-register flexibility without the endurance cost of a genuinely wide rim.

Independent shopping perspective
Yamaha's standard-series French horn mouthpiece, voiced for Bb horn: 16.87mm rim, semi-shallow V cup, aimed at a warm sound. A sensible step off a stock 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
Middle of the standard range. Enough room for low-register flexibility without the endurance cost of a genuinely wide rim.
Detail 02
Centers and slightly brightens the sound compared to a deep cup, and takes some work out of the upper register.
Detail 03
Standard bore. Gives you even resistance to push against rather than the loose, free blow of a large throat.
Detail 04
Opens the sound a little and helps the low register speak without thinning out the top.
Detail 05
Spreads pressure across more of the lip, which helps endurance. Less bite than a thin rim, less agility too.
Detail 06
Voiced around the Bb side. On a double horn the F side can respond a little differently.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Within this series the number tracks rim diameter, so higher runs wider. The 30 sits mid-range at 16.87mm. The letters indicate cup shape and depth.
It's a consistent, measured rim and cup rather than a generic one. A reasonable first move, not a specialist piece for a particular section role.
Yes, it uses the standard French horn shank. It's voiced for the Bb horn, so expect the F side to feel slightly different in response.
It sits near Yamaha's HR29B with a different rim contour, and its cup profile is comparable to a Tilz 39S.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.