... white spheres,non-toxic,odorless high purity aluminum oxide GB/T6166-1985ISO 9001:2008 High density,mechanical strength Activated Alumina ... milky white spheres, non-toxic, odorless Raw Material: high purity aluminum oxide Standard: GB/T6166—1985 Such Features Good ... adsorption, Strong catalytic activity, porosity, High dispersity and Large specific surface. Alumina Polishing Balls ...