These tuning forks have been designed for use in therapeutic applications. Tuning forks can be used in a variety of situations, including relaxation during a coffee break, at home, and in professional tuning fork therapies. Each tuning fork is tuned exactly to the frequency of the respective celestial body in order to achieve a therapeutic effect.  Features Handcrafted masterpiece Made in Germany High quality nickel plated steel Ergonomic shaped cork handle Engraved logo and tuning info Therapeutic effect: creates physical well-being helpful for a meditative basic attitude  helps to be relaxed in the here and now helps to harmonize stress factors can be used as a learning aid to support the physical and mental environment of children and adults leads to reassurance helpful for fidgety, nervous children (ADS) Specifications Material: High Quality Nickel Plated Steel Tone: 250.56 Hz / H3 A4/a' 440 Hz ? 446.5 Hz Color: yellow green Size: 6.5 / 16.5 cm