Guangzhou 7 Gram Machinery Equipment Co.,Ltd is a combination of manufacturer and exporter of jewelry equipment and tools with 12 years in China. It supplies more than 1000 styles of jeweler's tools, including scales, bristle brushes, cotton buff wheels, diamond testers, all kinds of jewelry making machines and associated items, which have the price and quality advantages from self-manufacturing to achieve the integration of industry and trade. These products have been exported to the USA, ...