... ISO 9001:2008 4.Acid resisitance(%):>99.6% Hardness-9.5 Inert Alumina Ball , Inert White Alumina BallsProfessional ... media Al2O3:17%-99.5%Size: 3,6,9,13,19,25,38,50MMVODA Inert Ceramic Ball ... 92>5.33>5.28>82 inch (50mm)>9.7>9.8>6.22>8>15 Sample one:Sample ... my mobile phone: 8618979999009. ( function(){ var aBigImageSrc = [ 'http://i01.i.aliimg.com/photo/v6/548817825_1/Inert_Alumina_Ball_Hardness_9_5.jpg ...