Quartz Crystal Bowl These bowls are made by pulverizing and heat-molding quartz crystal. A (La) = Tuned to a base of 432Hz Set of 7 Diameters from 12 inches (30 cm) to 7 inches (17.5 cm) Scales from C (Do) to B (Si) The seven notes of the Do-Re-Mi-Fa-So-La-Si scale No semitones The sound energy emitted from these is wonderful. You can experience very powerful energy. The scale that resonates with each person is different, and for some, it may awaken past memories or stir emotions. There are various effects. Although new, they have been opened for inspection and photography. Tuned to A4 (La) = 432Hz. Modern instruments are all tuned to A4 = 440Hz, but before 1939, classical music was tuned to 432Hz. Mozart and Vivaldi composed in 432Hz. 432Hz tuning sounds gentler and more beautiful, and has a healing effect. Nowadays, 432Hz instruments are used to let children listen to scales in education like Steiner education. Trial performance videos: Posting URLs and linking externally is prohibited by Mercari guidelines. You may be able to find reference videos by searching for "メルこんにちは" on a certain famous video site. The Quartz BE is this product. Includes: 2 rubber drumsticks 2 leather-covered sticks 7 rubber rings to place underneath 2 carrying bags (holds all 7 bowls) Will be shipped in the original box. Weight is 17 kg including packaging The weight of the bowls themselves is about 15 kg. Shipping included.