TOPFUND Singing Bowls Perfect Pitch F Note Crystal Singing Bowl Heart Chkara 10 inch (O-ring and rubber mallet Included) High purity quartz made crystal singing bowls, the highest quality standards and the best quality crystal singing bowls in the world made by TOPFUND. Each crystal bowls quality musical tones and chakra tuned inspection guaranteed. All TOPFUND singing bowls are Local fast shipping inside USA by FedEx, DHL, UPS or USPS, 2-5 days shipping time guaranteed. Instructions papers of Reiki bowls , O ring and rubber mallet included inside each singing bowls package. TOPFUND O ring is thicker than other sellers.TOPFUND Industry is a professional manufacturer of quartz products, such as quartz crystal singing bowl, tuning fork, didgeridoos, crystal Singing Pyramid and Steel Tongue Drum, and so on . Free Replacement for singing bowls broken during shipping and 30 days return guaranteed .