... G14,G16,G18,G20,G25,G40,G80,G120Hardness:42-64HRCDensity:7.6g/cm3UsageSurface cleaning and rust removing for cast iron, ... :60~64HRCDeviation±3.0HRC(±40HV) Durability2000-2800times Minumum Density 7.6g/cm3Media Selection Guide Glass BeadsCeramic BeadsCut WireSteel ShotSteel GritAluminum ... med-highmed-highmedlow-medvery lowmed-highHardness MOH Scale5.576-7.56-7.58-98-9985.53-45-6Bulk Density (lb/cu ...