The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5990-00-818-7136
NSN 6135-01-205-5965
NSN 5965-01-290-0535
NSN 6130-00-684-6773
NSN 5985-01-323-3025
NSN 6320-00-139-1090
NSN 5950-01-421-9243
NSN 6145-00-596-8447
NSN 5996-01-370-5570
NSN 5910-01-437-3535
NSN 5910-01-230-3384
NSN 6320-01-211-6578