These energy chime bars ares made from a special aluminium alloy producing rich, long lasting sounds. These are used for healing as they produce different vibrations and frequencies. These are a set of 7 chakra energy frequencies. These chakra energy chime bars are based on the following tones- energy bar chime 3rd eye chakra tone "a", energy bar chime crown chakra tone "b", energy bar chime root chakra tone "c", energy bar chime sacral chakra tone "d", energy bar chime solar plexus chakra tone "e", energy bar chime heart chakra tone "f", energy bar chime throat chakra tone "g". These are suspended above good quality wood base for a clear resonating tone. The sound vibrations emitted by these energy chimes are rich in natural harmonics, which are the healing component of music, triggering alertness, concentration and deep relaxation. Energy chimes are used for healing and relaxing. Incredible resonance helps to focus the mind in meditation. Perfect for feng shui energy clearing and chakra balancing. Note:- All tuning forks are tested with +/- 0.25% accuracy and all pipes, chime bars are tested with +/- 0.5% accuracy. At times there may be import duty payable for buyers other than USA for which we are not responsible and is to be paid by you.