1.high hardness 2.used for grinding, blasting,polishing 3.size: 0-100um 4. non alkali glass bead Grinding Glass Bead with High Hardness1. The chemical composition is inert silicon dioxide, having no chemical activity and free from any interference;2. Spherical particles can resist impact resistance and can be recycled for many times, with less wear; 3. Having small wear for the sprayer, which can ...