CNC Granite Base is made by Black Granite. ZhongHui IM will use nice black granite for CNC Machines. ZhongHui will implement strict accuracy standards (DIN 876, GB, JJS, ASME, Federal Standard…)to ensure that every product leaving the factory is a high-quality product. Zhonghui is good at ultra precision manufacturing, using different materials: such as granite, mineral casting, ceramic, metal, glass, UHPC…