"THIS NSN IS USED TO PURCHASE A MINIMUM OF 40 TO A MAXIMUM OF 119 CONTAINERS. TO PURCHASE A MINIMUM OF 1 AND A MAXIMUM OF 39 CONTAINERS USE NSN3439-01-397-1971, TO PURCHASE A MINIMUM OF 120 OR MORE CONTAINERS USE NSN 3439-01-407-7660. MATERIAL IS A FREE FLOWING, PRE-STABILIZED MAGNISIUM ZIRCONATE POWDER, CERTIFICATION: PWA133G; RR9507/21."