Symphonic and jazz trumpet players have always experimented with ways to create a darker sound by using various mouthpiece add-ons to add weight and mass. The Bach Mega Tone Mouthpiece takes these experiments one step further.To create the Mega Tone, Selmer starts with genuine Vincent Bach mouthpiece designs and more than doubles the outside mass. This darkens the sound and allows you to play at higher dynamic levels without distortion. Mega Tone slots extremely well so pitches center dependably, and a slightly larger throat affords less resistance and greater flexibility. The result is a warmer, more powerful sound that adds a new dimension to concert, pop and jazz playing.Model No. - Depth of Cup/Approx. Cup Dia./Rim ShapeDescription 1 - Deep/17.50mm/Medium thinExtra large cup for players with a robust embouchure. Produces a great volume of tone. 1B - Medium deep/17.00mm/Medium wideLarge cup for players with a robust embouchure. Produces a warm tone with great volume. 1C - Medium/17.00mm/Medium wideLarge diameter, medium cup, good for all-around use. 1D - Medium shallow/17.00mm/Medium wideMedium shallow cup facilitates high register. Brilliant sound. 1E - Shallow/17.00mm/Medium wideFacilitates high register. Excellent mouthpiece for soprano or piccolo trumpet. 1¼C - Medium/17.00mm/Medium wideLarge cup for powerful trumpeters. Compact tone of great carrying power. 1½B - Medium deep/17.00mm/Medium wide, not too sharpProduces a scintillating, warm tone of large volume. For players with a well-trained embouchure. Comfortable rim contour. 1½C - Medium/17.00mm/Medium wide, not too sharpLarge diameter, medium cup, good for all-around use. 2C - Medium/16.50mm/Medium wide, lowered toward the outsideLarge cup; powerful, brilliant tone. For players with a good embouchure. 2½C - Medium/16.40mm/Medium wide, lowered toward the outsideLarge cup; brilliant, heroic, crisp C trumpet tone. For players with strong, muscular lips. 3B - Medium deep/16.30mm/Medium wideA fairly large cup. The tone is warm and full. 3C - Medium/16.30mm/Medium wideFairly large cup with a full, rich tone. Good for all-around use. 5B - Medium/16.25mm/Medium wide, lowered toward the outside. Medium sharp edgeA precise rim and fairly large cup. The tone is warm and full. 5C - Medium deep/16.25mm/Medium wide, well rounded toward the inside and outside, fairly flatFor players with a strong embouchure who do not like a sharp edge. The tone is lively and rich. 7C - Medium/16.20mm/Medium wide, lowered toward the outside. Medium sharp inside. Well rounded edge with a perfect gripProbably the most widely used model in the world. Its brilliant tone is preferred by school musicians and by artists.