"THIS NSN IS USED TO PURCHASE A MINIMUM OF 40 OR MORE CONTAINERS, TO PURCHASE A MINIMUM OF 1 TO A MAXIMUM OF 9 CONTAINERS USE NSN 3439-01-380-1990, TO PURCHASE A MINIMUM OF 10 TO A MAXIMUM OF 39 CONTAINERS USE NSN 3439-01-411-2591. CERTIFICATION: B50TF56, CLB"