... professioanl manufacture 2.ISO9001:2008 3.Size:3,6,10,13,19,25,38,50mm Inert Ceramic Ball of Size 3,6,10,13,19,25,38 ... absorption (%)<0.5Bulk density (g/cm3)1.35-1.4Specific gravity (g/cm3) 2.3-2.4 Free volume (%)40Operation temp.(max ... hardness (scale)>6.5Acid resistance (%)>99.6Alkali resistance (%)>85 Size available & Crush strength SizeCrush strengthKg/particleKN/particle1/8''(3mm)>35>0.351 ...