http://www.mayjoy-abrasives.com/sandblasting-media/ Our Glass beads blasting is made from white flat glass, it is a spherical abrasive manufactured from chemically inert soda lime glass. Glass microsphere produce a bright satin finish, finer beads produce a smoother non glare finish, while larger beads produce a deeper textured finish. Blasting with Glass Bead does not produce any dimension changes to the part base surface.