"THIS NSN IS USED TO PURCHASE A MINIMUM OF 20 TO A MAXIMUM OF 59 CONTAINERS, TO PURCHASE A MINIMUM OF 1 TO A MAXIMUM OF 19 CONTAINERS USE NSN 3439-01-391-8632, TO PURCHASE A MINIMUM OF 60 OR MORE CONTAINERS USE NSN 3439-01-407-6299. CERTIFICATION: B50TF222-S2, CLB."