"NSN USED TO PURCHASE A MINIMUM OF 3 CONTAINRS TO A MAXIMUM OF 7 CONTAINERS;CERTIFICATION GE B50TF167-S1 CLASS A AND RR 9507/1;RC 55-65 HARDNESS;9000 PSI MINIMUM STRENGTH;DIAMOND WET GRINDING;AGGLOMERATED, SPHERICAL, 16% COBALT COMPOSITE POWDER.MATERIAL YIELDS THIN, DENSE, HARD COATINGS RESISTANT TO ABRASIVE AND SLIDING WEAR.FOR USE BELOW 1000DEG (F)"