Features: The bowl sings very easily and produce rich, harmonic and soothing sound that lasts for long duration. Produce energetic and vibrating sounds which provided stress free relaxation. These singing bowls has been used for meditation, music, relaxation, personal well being, healing energy and chakra creation etc. for generations. They are used by a wide range of professionals, including health professionals, school teachers, musicians and spiritual teachers. Singing bowls are used in health care by psychotherapists, massage therapists, cancer, and stress and meditation specialists. They are used to help treat cancer patients and also for post-traumatic stress disorder. They are popular in classrooms to help facilitate group activities and focus students' attention. Specifications: Material: Copper+Wooden Inner Diameter: 8cm/8.5cm/9.5cm/10.5cm Quantity: 1Set Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-3cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Singing Bowl 1 x Hand Hammered