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:
| Order# | Description |
| TFRB256 | 256 Hz/ C' |
| TFRB320 | 320 Hz/ E' |
| TFRB341 | 341.3 Hz/ F' |
