The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6650-00-963-1692
NSN 5905-00-082-1927
NSN 6685-00-720-3525
NSN 5960-00-147-7475
NSN 5945-01-363-0885
NSN 6650-01-536-4086
NSN 6110-01-411-5645
NSN 5925-00-249-1287
NSN 5930-01-468-6478
NSN 6650-00-910-2708
NSN 5990-01-490-5614
NSN 4140-01-317-8040