... Ball High hardness, no breakage, good Round have the SGS and TUV chemcial elements and hardness test ... .2. Cover 100,000 Km2, and the real building covers 30,000 Km2, total employees 897, ... and the working fund 5,000,000 USD dollar.3. The ... steel balls.4. 30years experience for exporting to the mines, cements, power stations in Africa, North America ...