Changsha Hengfeng Superhard Material Co.,Ltd was founded in 2000, which is specialized in producing and developing diamond powder,diamond crushing material. It has strong professional team and advanced testing methods, with all products in strict accordance with national standards. Diamond micro-powder is produced 60 million carats a year, RVD is produced 180 million carats a year. It passed the quality certification ISO9001. It has import and export rights,. The products were exported to the U.S., Britain, Germany, Japan, India, Taiwan, Hongkong and other countries and...