GRINDING MEDIA PRICE LIST Page 1 of 8 01/01/18 Ver. . Glen Mills Inc., 220 Delawanna Avenue, Clifton, NJ 07014 ... material has hollow, weak, and othermost debris removed. It is available in both wide and narrow ... in applications where a higher specific gravity is needed for effective grinding. Composition is 97% ZrO with ~3% MgO stabilizer.