"NSN IS USED TO PURCHASE A MINIMUM OF 20CONTAINRS TO A MAXIMUM OF 59 CONTAINERS;W2C/WC 12CO FUSED;-45 +5.5UM (-325 MESH +5.5);RESISTANT TO ABRASION AND EROSION.GOOD SLIDING WEAR RESISTANT.COATINGS ARE HARD AND DENSE W/GOOD BOND STRENGTHS.GOOD FRETTING RESISTANCE.USED FOR MACHINE PARTS,PUMP HOUSING ETC"