"NSN IS USED TO PURCHASE A MINIMUM OF 20CONTAINRS TO A MAXIMUM OF 59 CONTAINERS;FE 30MO 2C BLEND;-45 +5.5 UM(-325 MESH +5.5 UM);ALTERNATIVE TO HARD CHROME PLATING.RECOMMENDED TO PROTECT AGAINST ABRASIVE GRAINS,WEAR FROM HARD BEARING SURFACES AND FRETTING"