The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 2925-01-423-3003
NSN 5930-00-836-1080
NSN 5990-01-168-6797
NSN 6135-01-070-3865
NSN 5965-01-270-1039
NSN 6110-01-188-6026
NSN 5960-01-513-3230
NSN 5999-00-456-0603
NSN 6620-01-507-3276
NSN 5999-00-189-0032
NSN 5996-01-431-9759
NSN 5985-00-944-0171