1. physical experimental instrument, and practical.
2. Two tuning forks of the same efficiency are made of the whole 45# carbon steel.
3. The edges and corners are neat and the 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 general tuning fork of a variety of experiments, such as the sound of the occurrence, interference, sound conduction of various substances.

Specification:
Features:
physical experimental instrument, and practical.
Two tuning forks of the same efficiency are made of the whole 45# carbon steel.
The edges and corners are neat and the is chrome plated, the frequency is 440 cycles per second.
The tuning fork set is used to demonstrate the resonance of sound in school.
Can be used as a general tuning fork of a variety of experiments, such as the sound of the occurrence, interference, sound conduction of various substances.
Specification:
Condition: brand new
Frequency: 440 cycles per second
Fork section size: 6.5 * 16mm / 0.3 * 0.6in
Tuning fork arm length: approx. 109mm / 4.3in
Distance between arms:17mm / 0.7in
Package List:
2* Tuning Fork
2* Wood Resonator Box
1* Knocker
Note:
1. The tuning fork should be protected from breaking and high heat to prevent frequency change.
2. The tuning fork and the sound box should have a connection and should not be shaken when the tuning fork is inserted or removed.