Glass bead for jetting has the features of chemical stability, high mechanical intensity and hardness. They can be jetted onto the object surface with compressed air and can be used on compress glass, rubber, plastic, and moulds with metal casting or compressing. The jetting balls would help reduce elasticity of the surface materials and increase wearing capacity. Appearance: clean and transparent, no visible bubbles and impurity. Density: 2.4-2.6 g/cm3 Hardness: 6-7 Spherical beads: ≥75% SiO2 content: ＞70%