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We've taken great care to design a multi-tapered backbore that works well in a large variety of bore sizes.
The playing qualities are excellent: even feel and resistance across the entire range of the horn with outstanding intonation.
This backbore is offered in bore sizes ranging from 4mm to 5.8mm in 0.2mm increments in American external taper and from 4mm to 4.8mm in German external taper.



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