The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5835-01-193-6192
NSN 5935-00-556-9398
NSN 6135-01-391-8539
NSN 5950-01-155-8737
NSN 6685-00-934-8676
NSN 5996-00-636-4019
NSN 6650-00-474-7420
NSN 5998-00-554-9725
NSN 6620-01-198-9448
NSN 6610-01-496-1806
NSN 6145-00-165-3869
NSN 6130-00-793-9851