4 x Tuning Fork 4 x Wood Resonator Box 2 x Small hammer 2 x Knocker-silver

1. High quality physical experimental instrument, durable and practical. 2. 4 tuning forks of the same efficiency are made of the metal. 3. The edges and corners are neat and the surface is chrome plated, the frequency is 440 cycles per second. 4. The tuning fork set is used to demonstrate the resonance of sound in school. 5. 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.