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

3. The tuning fork set is used to demonstrate the resonance of sound in school. 2. The edges and corners are neat and the is chrome plated 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. 1. High quality physical experimental instrument, and practical. 5. It can be used for Music Learning and acoustic experiment.