... with the quality of clean,transparent,no bubbles and impurity. Widely used in sandblasting,polishing,grinding. H&X glass beads with the ... quality of clean,transparent,no bubbles and impurity. Widely used in blasting,polishing,grinding etc. ModelMeshSize μm 30# 20-40 ... UsageGrinding MaterialBS6088 British StandardAASSHTO M247 American Standard Abrasive glass beads for sandblasting and polishing