High-performance glass bubble & hollow glass microsphere is a kind of ultra-lightweight inorganic non-metallic material with hollow structure, and it is a versatile and high-performance new lightweight material developed in recent years. It is expected to be the new composite materials for the twenty-first century. Applications: oil well cementing materials?( light-weight cement slurry). Specifications: Color : White, Pressure : 12000 PSI, True Density : 0.6 gm/cc; Bulk Density : 0.39 g/cc; Maximum particle size : 80 um ; Rate of Floatage : 92%.