Item Type: Music Bowl Set Material: Quartz Rubber Hammer Size: Approx. 21 x 3cm / 8.3 x 1.2in Rubber Ring Diameter: Approx. 8.5cm / 3.3in Package List 1 x Singing Bowl 1 x Rubber Hammer 1 x Rubber Ring 1INCLUDED TOOLS: Music singing bowl set, blue crystal bowl, and equipped with rubber hammer and rubber ring, convenient for operation. 2QUARTZ BOWL: The singing bowl is made of excellent quartz, with high hardness, scratch resistance, high temperature resistance. 3MAIN PURPOSE: When sound is projected onto the damaged area, the correct harmonic pattern is restored, beneficial to the human body. 4WORKING PRINCIPLE: Sound and frequency affect every atom and cell, the music singing bowl can emit harmonious natural resonance frequency. 5APPLICABLE SCENES: For various scenes, such as meditation, stress relief, indoor exercise, etc., to balance the body chakras and adjust emotions.