"NSN USED TO PURCHASE A MINIMUM OF 1 CONTAINER TO A MAXIMUM OF 2 CONTAINERS;CERTIFICATION PWA 1305, GE B50TF137 CLASS A, AVCO M3965 AND RR 9507/17;RC 50-55 HARDNESS;3000 PSI MINIMUM STRENGTH;BEST FINISH BE WET SANDING;MIXTURE OF 75% CRYSTALLINE CHROMIUM CARBIDE AND 25% NICKEL CHROMIUM ALLOY POWDER.1000-1500 DEG (F) FOR RESISTANCE TO ABRASIVE AND FRETTING TYPE WEARS.COATIN GS ARE HARD,DENSE AND TIGHTLY ADHERENT.PARTICULARY SUITED FOR THIN SMOOTH COATINGS"