a) Products according to international standard include: English Bs6008, Korean, KS and American AASHTO b) You can choose glass beads in different sizes between 50μm ~ 1,180μm according to different functions c) Technical references: 1) Appearance: colorless and transparent ball, no visible bubbles and impurity 2) Spherical beads: ≥80% (600<850μm,>68%)