"NSN IS USED TO PURCHASE A MINIMUM OF 1 CONTAINER TO A MAXIMUM OF 19 CONTAINERS;NI 17CR 4FE 4SI 3.5B 1C,SPHEROIDAL,GAS ATOMIZED;-106 +45 UM (-140 +325 MESH)RC 50-62 HARDNESS;TEXTURE/FINISH FINE,GROUND VERY GOOD TO EXCELLENT;COATING NUMBER T15E-10;NICKEL-CHROMIUM-BORON HARDFACING ALLOY.PRODUCES HARD,VERY DENSE,ESSENTIALLY PORE-FREE COATINGS THAT RESIST CORROSION AND WEAR BY ABRASIVE GRAINS,HARD SURFACES,PARTICLE EROSION AND CAVITATION,IN BOTH HIGH AND LOW TEMPREATURES.MEETS REQUIREMENTS OF MIL-R-17131A AND API STANDARD 610"