Features: Material: Crystal singing bowls are made of quality crystal. The sound is clear and lasts for a long timing. They look and sound beautiful. Each product has been carefully selected to ensure accurate note and clear sound. Product: This crystal singing bowls with lotus gradient design is natural color, elegant in shape, simple and solemn. The crystal bowl has a strong sense of rhythm and vibrations and a wide range of effects. Efficacy: Crystal singing bowls for yoga, sound healing, beginning and ending of meditation, balancing chakras; reduceing stress and anxiety, increases positive intention; deeply relaxes and relieves pains. How to Play: Put the rubber rings that comes with the bowl on a flat and firm surfaces, then place the bowl on it. Tap lightly on the outer rims of the bowl and start guiding the tap around the corners of the outer rims. Package List: 1pc x Crystal Bowl, 1pc x Rubber Hammer​, 1pc x O-ring Rubber Rings. If you have any questions, please feel free to contact-us, we will try our best to solve the problem. Specifications: Material: Quartz Glass Color: Blue Style Options: 3 Style are Available as Shown in the Picture. Size: approx.17x17.5x17.5cm/6.69x6.89x6.89in (More Size Detail, Please See Photo.) Package Includes: 1 Set of Crystal Singing Bowls note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thanks!