Inert 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 ... 2.3-2.4 Free volume (%)40Operation temp.(max) (°C)1100Moh’s hardness (scale)>6.5Acid resistance (%)>99.6Alkali resistance (%)>85 Size ... 6mm)>60>0.603/8''(10mm)>85>0.851/2''(13mm)>185>1.853/4''(19mm)>487>4.871 ...