Our best-selling Tuning Fork Sets now come in a wooden box with foam lining. Each tuning fork has a specific place in the foam lining die-cut for easy storage. Each set also contains a mallet specially designed with one hard and one-soft end, for use with all frequencies of forks. Boxed set of 13: 100, 128, 256, 288, 320, 341.3, 384, 426.6, 480, 512, 1024, 2048, and 4096 Hz. frequencies. Box and packing foam color may vary from the one pictured.