Quality brass mouthpieces contribute to the high regard Yamaha has earned among beginning and professional musicians alike. The result of a special approach to design and manufacture, Yamaha mouthpieces deliver the performance and comfort required where they are needed most: where instrument meets musician.

The mouthpiece production technique used by Yamaha promises consistent quality mouthpieces, time after time. Other manufacturers use a specific cutting tool to create every mouthpiece, which causes problems as tools start to wear. This can result in inconsistent quality and poor performance. Yamaha's computer-aided design system and computer controlled lathe work together to produce the most precise, consistent mouthpieces in the world.

Standard French Horn Mouthpieces Specifications
Model	Rim			Cup Depth	Throat	Backbore	Playing Characteristics
	Inner Diameter	Contour	Thickness
28B	16.87	standard	semi-thick	semi-shallow (V-cup)	3.9	semi-wide	Ideal for Bb /HF horns. Smallest "V" cup in the line, but with a soft, mellow tone.
29B	17.07	standard	semi-thick	semi-shallow (V-cup)	3.9	semi-wide	Fairly thick rim with a relatively small inner diameter for superior high tone. Medium throat for easy all-around playing.
29C4	17.08	semi-flat	thick	standard (U-cup)	3.98	semi-wide	Ideal for Bb /HF horns. Relatively sharp shoulder and medium throat for clear tone.
29D4	16.88	semi-flat	medium	semi-deep extra-( double-cup)	4.5	semi-narrow	Double-cup combining medium and extra-deep "V" cups. Fairly small inner diameter, but with a large throat for rich tone.
30B	17.27	standard	medium thick	semi-shallow (V-cup)	3.9	semi-wide	Standard "V" cup model with a larger inner rim diameter than the 29B. Smooth airflow. Ideally matches horns with a very narrow bell.
30C4	17.28	semi-flat	medium	standard (U-cup)	3.98	standard	Medium inner rim diameter and "U" cup for fast response. Standard type with ideal resistance and powerful, rich tone.
30D4	17.08	semi-flat	standard	semi-deep (double-cup)	4.5	semi-narrow	Exceptionally rich tone. Matches horns with a wide bell. Excellent stability on high notes.
31B	17.3	standard	medium thick	semi-shallow (V-cup)	3.9	semi-wide	Medium inner rim diameter with a "V" cup for a "traditional" soft horn tone. High volume over a wide range. A good match for horns with a narrow bell.
31D4	17.28	semi-flat	medium	semi-deep (double-cup)	4.5	semi-narrow	Heavy tone and high volume. Relatively flat rim of medium thickness for easy playability.
32B	17.67	standard	semi-thick	semi-shallow (V-cup)	3.9	semi-wide	Large inner rim diameter for outstanding low-note tone. Largest "V" cup in the lineup. Rich, mellow tone.
32C4	17.48	semi-flat	medium	standard (U-cup)	3.98	standard	Plenty of volume. Relatively flat rim of medium thickness for easy playability.
32D4	17.48	semi-flat	medium	semi-deep (double-cup)	4.5	semi-narrow	Large cup volume for a dark, heavy sound and easy low notes.
33C4	17.68	semi-flat	medium	standard (U-cup)	3.98	standard	Largest "U" cup in the lineup. Can deliver a big, expansive sound. For advanced players.
33B	17.87	standard	semi-thick	semi-shallow (V-cup)	3.9	semi-wide	V cup with rich and mellow tone.
34B	18.07	standard	semi-thick	semi-shallow (V-cup)	3.9	semi-wide	Larger V cup in the line up. For Advanced players.
34C4	17.88	semi-flat	medium	standard (U-cup)	3.98	standard	Plenty of volume. U cup for powerful performance.
35C4	18.08	semi-flat	medium	standard (U-cup)	3.98	standard	Larger U cup in the line up. Can deliver a heavy sound.