"NSN IS USED TO PURCHASE A MINIMUM OF 8 CONTAINRS TO A MAXIMUM OF 23CONTAINERS;ZRO 24MGO,SPHEROIDAL,HOSP;-75+11 UM (-200 MESH +11 UM);CERTIFICATION GE A50TF155 CLASS A AND JET AVION JA1333;USED FOR THERMAL BARRIER COATINGS.RECOMMENDED FOR COMBUSTION APPLICATIONS.ABRASIVE WEAR RESISTANT TO TEMPREATURES OF 1650DEG (F).COATINGS RESIST WETTING AND CORROSIVE EFFECTS OF MOLTEN METAL.APPLICATIONS INCLUDE DIESEL ENGINE PISTONS,VALVES,CYLINDER HEADS,AND COATINGS FOR CASTING MOLDS AND TROUGHS"