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Standard Flugelhorn mouthpieces. 
Model No. / Depth of Cup / Approx. Cup Dia. / Rim Shape / Description
1* / Deep / 17.50 mm / Medium thin. / Extra-large cup for players with a robust embouchure. Produces a great volume of tone.
1C* / Medium / 17.00 mm / Medium wide. / Large diameter, medium cup — good for all-around use.
1-1/4C / Medium / 17.00 mm / Medium wide. / Large cup for powerful trumpeters. Compact tone of great carrying power.
1-1/2C* / Medium / 17.00 mm / Medium wide, not too sharp. / Large diameter, medium cup — good for all-around use.
2C / Medium / 16.50 mm / Medium wide, lowered toward the outside. / Large cup; powerful, brilliant tone. For players with a good embouchure.
2-1 2C / Medium / 16.40 mm / Medium wide, lowered toward the outside. / Large cup; brilliant, heroic, crisp C trumpet tone. For players with strong, muscular lips.
3 / Deep / 16.30 mm / Medium wide. / Fairly large cup with full, rich tone.
3B / Medium deep / 16.30 mm / Medium wide. / A fairly large cup. The tone is warm and full.
3C* / Medium / 16.30 mm / Medium wide. / Fairly large cup, good for all-around use.
5A* / Very deep / 16.25 mm / Medium wide, rounded inside edge. / A fairly large cup with a dark, full, mellow tone.
5B* / Medium deep / 16.25 mm / Medium wide, lowered toward the outside. Medium sharp edge. / A precise rim and a fairly large cup. The tone is vivid and full.
5C* / Medium / 16.25 mm / Medium wide, well rounded toward the inside and outside, fairly flat. / For players with a strong embouchure who do not like a sharp edge. The tone is lively and rich.
6C* / Medium / 16.20 mm / Medium wide, not too sharp, rather flat. / A distinctive C trumpet cup. Its clear tone cuts through the largest bands and orchestras.
7* / Deep / 16.20 mm / Medium wide, lowered toward the outside. Med. sharp inside edge. / This popular model produces a colorful, liquid tone which is uniform over the entire scale. Desirable for all-around work.
7A* / Very deep / 16.20 mm / Medium wide, lowered toward the outside. Med. sharp inside edge. /
Warm, melodious, rich tone approaches the quality of a lyric
soprano voice. Free blowing.
7C* / Medium / 16.20 mm / Medium wide, lowered toward the outside. Med. sharp inside edge. Well-rounded edge with a perfect grip. /
Probably the most widely used model in the world.
Its brilliant tone is preferred by school musicians and by artists.
10 / Deep / 16.00 mm / Fairly wide with rather broad, flat surface. / Similar to No. 7, but smaller in size and with a broad, flat rim. Suitable for players with fleshy, soft lips.
10-1/2C* / Medium / 15.90 mm / Medium wide. / Fine high register, resonating low register. Particularly useful to players without a strong embouchure. Ideal for C trumpet.
* Bach flugelhorn mouthpieces are regularly stocked in those model numbers marked with an asterisk in the chart (all other standard Bach trumpet rim sizes are available on special order). They have identical rims, but deeper, fluegelhorn-style cups, a larger throat and backbore. The deeper cups produce a dark tone of lyric quality. Their fundamental component is intense; the upper partials are reduced to a minimum. Do not...
Bach Flugelhorn Mouthpiece
Bach mouthpieces are designed to meet every conceivable playing need and have for nearly three quarters of a century. A Bach mouthpiece will make a poor instrument play well, a good instrument play better. Volume and excellent intonation, ease of response in the high and low register, rich, uniform timbre throughout the range, and resistance calculated to increase the player's endurance - these characteristics explain why the best professional artists choose Bach.


Because Bach mouthpieces are the accepted standard of quality, their numbers are familiar everywhere as designations for certain models and types. Although Bach mouthpieces have often been copied, they have never been equaled for precision, tuning, and playing characteristics. Only genuine Bach mouthpieces bear the full inscription VINCENT BACH with one of the model numbers.