Bortivier Resonance Tuning Fork 136.1HZ with Resonant Box and Hammer, for Chakra, Yoga, Relaxation

1. High quality physical experimental instrument, and practical. 3. The tuning fork set is used to demonstrate the resonance of sound in school. 4. Can be used as a Universal tuning fork of a variety of experiments, such as the sound of the occurrence, interference, sound conduction of various substances. 2. The edges and corners are neat and the is chrome plated 5. It can be used for Music Learning and acoustic experiment.