Detail 01
.666 inch (16.92mm) cup diameter
Slightly narrower than the 30 at .670, so the lips sit in a marginally smaller circle.

Independent shopping perspective
Silver-plated Schilke 30B French horn mouthpiece: a .666-inch cup with a shallow B cup and thin flat rim, for players wanting easier high register.

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
Slightly narrower than the 30 at .670, so the lips sit in a marginally smaller circle.
Detail 02
Less cup volume than the standard 30's fairly deep cup, which is what shifts the balance toward the upper register.
Detail 03
Wider than the 30's .173, so it blows more freely with less back-pressure.
Detail 04
Concentrates contact on a narrow band. More precise placement, but less cushioning than the 30's wide rounded rim.
Detail 05
The standard finish on this series; the same 30-family sizes are also offered gold plated at higher cost.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Narrower at .666 inch versus .670, with a shallower B cup, a thin flat rim instead of a wide rounded one, and a larger .182 throat.
The shallower B cup reduces cup volume relative to the 30. For a model built specifically around the high register, Schilke points to the 28.
No. Different model as well as different plating: the gold 30 is the deeper Farkas cup at .670 inch with a wide rounded rim and tighter 17 throat.
The 32 is the large end of the range at .702 inch with extra cup volume and a larger backbore. The 31B pairs a wide rim with a medium-depth bowl cup.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.