... Ceramic Ball 1.20 years professioanl manufacture 2.ISO9001:2008 3.Size:3,6,10,13,19,25,38,50mm Inert Ceramic ... Ball of Size 3,6,10,13,19,25,38,50mm XINGFENG Catalyst bed ... /cm3)1.35-1.4Specific gravity (g/cm3) 2.3-2.4 Free volume (%)40Operation temp.(max) (°C)1100Moh’s hardness (scale ...