H&X glass beads with the quality of clean,transparent,no bubbles and impurity. ... ,polishing,grinding. H&X glass beads with the quality of clean,transparent,no bubbles and impurity. Widely ... 100-140 150-106 150# 100-200 150-75 180# 140-200 106-75 220# 140-270 106-53 ... %UsageGrinding MaterialBS6088 British StandardAASSHTO M247 American Standard High Quality Glass Beads for Grinding, blasting, polishing