Glass beads 1.Roundness: >80% 2.Refractive index: >1.5 3.Gravity: appro. 2.5 4.Coating type: according to customer's requirement 5.Appearance: colorless, transparent ball, no visible bubbles and impurity. 6.Application: for road marking Packing 1)size: 25kgs per bag/ one ton bulker bag 2)pallet: according to customer's requirements