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Jackcom R3 Smart Ring NFC Device For IOS, Android Phone Liquid Tungsten Amorphous Carbide Alloy 1. Liquid metal called metallic glass, has no grain structure, possesses higher strength, lower elastic modulus, and never deforms after bending. 2. It is a modern alloy technology with science-fiction style and is the best shell material in electronic devices. Besides, it not only meets the requirements...