Which jews harp is best for a beginner?

Magnetic Ball for the DG644 Jew's Harp

Magnetic Ball for the DG644 Jew's Harp
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Oberton Pro Lab measurements:
Overall dimensions: 5x5x5 mm (?)
1 USD
Shipping: from 3 USD (more...)
Stock: Yes (5+) (n/a, Серый) (?)

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Magnetic ball weighter for DG644 jews harp. As any magnet, must not be used with other jews harps with both frame and reed made of magnetic steel - it will tamper sound.