Meinl Standard Pitch Crystal Tuning Fork (CTF440)This listing includes the crystal tuning fork, striker, and carrying case. Meinl's Standard Pitch Crystal Tuning Fork The Meinl Sonic Energy Standard Pitch Crystal Tuning Fork is crafted from high purity quartz crystal, offering a rich vibrational resonance ideal for meditation, relaxation, and therapeutic use. It is tuned to 440 Hz, the universal reference pitch for musical instruments. Each Standard Pitch Crystal Tuning Fork comes with a protective