"SKULLDUGGERY, INC."

This aluminum tuning fork has sliding weights on each tine.

Even frequencies make harmonic relationships clear and calculations easier.

Energy Transfer Demonstration

Includes set of six tuning forks: 125, 250, 500, 1000, 2000, and 4000 Hz.

WARNING: CHOKING HAZARD–Small Parts. Not for children under 3 yrs.

Make sound measurements with greater precision and convenience.

Break light into its components wavelengths

Alloy tuning fork economy stamped.

These long-lasting aluminum tuning forks have a full sound.

Make the study of light and color fun and easy