Reeds (tongue) - made of vocal steel; strength 1.950 50 N/mm2 in the tolerance T3, fine grinded and hand-polished, with the accuracy 10 Cent, the fitting-part 7 - 9 mm with the corrosion prevention. Reeds plates are made of dural aluminium, hardness 160 HB, cut with the spark erosion technology, the surface Ra 0,8 micron. Reeds are rivet by hand, the play between the reed (tongue) and the reed channel is 0,02 - 0,03 mm, tuning with accuracy 5 cents.

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