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 ... used in blasting,polishing,grinding etc. ModelMeshSize μm 30# 20-40 850-425 40# 30-40 ... MaterialBS6088 British StandardAASSHTO M247 American Standard High Quality Glass Beads for Grinding, blasting, polishing