4 ABRASIVE PAPER, SILICON CARBIDE WET GRIND PAPER, CHEMOTEXTILE POLISHING CLOTHS, DIAMOND AND EMERY PAPER GRINDING DISCS, ABRASIVE POWDERS-NAMELY, SILICON CARBIDE, ALUMINUM OXIDE, MAGNESIUM OXIDE AND BORON CARBIDE, FOR USE IN GRINDING AND POLISHING METALLURGICAL TEST SAMPLES