4 OPTICAL POWDER FOR GRINDING AND SMOOTHING LENSES, CRYSTAL FINISHING POWDER AND ALUMINUM OXIDEFOR LAPPING AND GRINDING LENSES, SILICON CARBIDE FOR LAPPING AND CUTTING LENSES, MICRO ALUMINA AND CERIUM OXIDE FOR POLISHING LENSES, LENS POLISHING POWDER, GLASS BEADS FOR LENS POLISHING, DIAMOND GENERATOR LAPS, ABRASIVE DIAMOND EDGIING WHEELS, ABRASIVE DRESSING HONES, AND ABRASIVE LAP TRUING DISCS