Each unit consists of a wooden resonator box, tuning fork and tuning fork mallet.
The Resonator Box is 18cm x 9cm x 5cm.
Available in three tuning frequencies listed below:
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Order# | Description |
 TFRB256 |  256 Hz/ C' |
 TFRB320 |  320 Hz/ E' |
 TFRB341 |  341.3 Hz/ F' |