The Meinl Sonic Energy Planetary Tuned Energy Chimes are created utilizing the calculations of Hans Cousto The Cosmic Octave to match the frequencies of The Sun moon and planets. Each chime is tuned to create the celestial body s matching frequency. Made with silver anodized aluminum alloy for an exact frequency. The decorative wooden base is finished with an engraved logo and tuning symbol and each chime comes with a wooden mallet that produces a clear and defined note to easily fill your space small or large with soothing sound. This mallet can be conveniently stored on the wood base by tucking it under the chime. These high-quality energy chimes are ideal for therapeutic and meditative purposes but they may also be used in classrooms or as a sound signal. The chimes included in this 16-pc set: Sidereal Moon Venus Neptune Synodic Moon Uranus Sidereal Day Synodic Day Jupiter Sedna Chiron Platonic Year Saturn Mars Mercury Earth Year/Om and Sun. Also comes with sixteen wooden mallets one for each chime.