10" Diameter Green/Heart Chakra Colored Crystal Singing Bowl With 9" Wooden Rubber Mallet and Rubber Ring Base Included. Tuned to 432Hz. Each bowl is tuned to a specific note often used in sound therapy, meditation, and energy healing practices to promote relaxation, balance chakras, and facilitate spiritual growth and well-being. The 10-inch diameter Heart Chakra Crystal Singing Bowl is a remarkable instrument designed to harmonize and nurture the energy associated with the Heart Chakra. Meticulously crafted with care and precision, this crystal singing bowl emits soothing and enchanting tones that create a deeply resonant and transformative vibrational experience.