The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5998-01-304-9983
NSN 5915-01-311-5416
NSN 6620-00-220-2157
NSN 5975-00-233-5954
NSN 6650-01-546-5199
NSN 2925-00-749-8893
NSN 5835-01-495-0595
NSN 5990-00-943-1514
NSN 5965-01-233-8607
NSN 6130-01-254-4650
NSN 5996-00-072-1528
NSN 2925-01-448-2880