Steel N.P. Tuning Forks set of 8, with long handle for convenient handling. Frequency engraved on handle. Packed in thermocole box for storage. 1 each of, C-256, D-288, E-320, F-341.3, G-384, A-426.6, B-480, C-512. NOTE: Steel Tuning Forks are better than Aluminum Tuning Forks, because they Vibrate longer due to their heavier mass, thereby helping in experiment time.