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5 to 3 DC volts
Voltage requirements are 1
For biology
With instructions
Aluminum also is less sensitive to temperature and humidity variations that could affect the frequency
Tuning Fork, Set of 8, Pythagorean Scale (PH36126/1) model 5 to 3 DC voltsProduct details Product Dimensions : 11 x 10 x 2 inches; 1. 88 Pounds Product description Tuning Fork, Set of 8, Pythagorean Scale. The set includes one fork each for: 256 Hz 288 Hz 320 Hz 341. 3 Hz 384 Hz 426. 7 Hz 480 Hz 512 Hz Ideal for physics experiments!
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