Superfine Barium Sulfate (800 Mesh), is general purpose grade ... %92-9690-94fineness: 325-mesh, 400-mesh, 600-mesh, 800-mesh, 1250-mesh, 2000-mesh, 3000-mesh, 6000-mesh 8000-mesh, 12500-mesh, 15000-mesh (Fineness can be ... custom-made upon client's request) Superfine Barium Sulfate (800 Mesh ...