Resonant Tuning Fork Set

Resonant Tuning Fork Set For the Demonstration of Resonance of Sound. Included in this set is a pair of Heavy Aluminum 440 Hz. Tuning Forks, a sliding bar to change frequency Two Resonance boxes and a striking mallet. Inside measurements of Resonance Boxes are 1.5 H x 3.125 W x 6.75 L (Inches) A preview of the included instructions can be found at the bottom of this listing.