... and chemical stability, perfect regularity and clean surface, the filling glass beads are used in the materials of plastic,rubber, hone ... .5%≤2.0%11Resistance to WaterNo mist on surface of glass bead, 0.01mol/l HCL consumption ≤10ml12AppearanceRound, Clean, Transparent ImpurityProduct ... -0102F38-45μmGY1-0001F0-38μmGY4-0001F0-38μm Filling Glass Beads For Industrial Purpose