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ML Bore Ø: 11.65 mm
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Brass bell Ø: 123 mm
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Vertical bridge support on the main tuning slide
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Slightly modified, a new bell with optimal material thickness
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Two-piece brass bell
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Monel valves
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Water keys on the 3rd valve slide and and on the main tuning slide
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New valve covers and finger button
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Finger ring on the 3rd slide
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Saddle on the 1st valve
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Silver plated
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Second set of Bb slides
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Incl. Yamaha TR11B4 mouthpiece and TRC-4435 case