United Scientific Octave Tuning Forks, Set of 8 Tuning forks provide a hands-on experience with resonance and pitch Set contains 8 different tuning forks Tuning forks include 1 each of C-256 Hz, D-288 Hz, E-320 Hz, F-341.3 Hz, G-384 Hz, A-426.6 Hz, B-480 Hz, and C-512 Hz Set also includes a special designed mallet Everything is packaged in a wooden box with foam lining