high hardness,big density,we have best quality goods to supply at reasonable price. Characteristichigh strength,high stabilityto chemical and thermal circumstance.It can resistance tio acid,alkali,saltand all organic solvents.UsePetroleum, chemical, fertilizer, natural gas and environmental protection,etcStoragein dry, ventilated, non-corrosive material warehouses, prevent rain water.Packing25kg/ ...