The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6150-01-590-4384
NSN 5965-01-562-4255
NSN 6620-01-140-8684
NSN 6685-01-055-6057
NSN 6110-01-398-1507
NSN 6240-00-101-9339
NSN 5998-01-210-8371
NSN 5915-00-570-0145
NSN 5965-01-370-1891
NSN 5925-01-021-3229
NSN 6650-00-754-2276
NSN 6135-01-154-3526