The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6320-00-149-7570
NSN 2925-00-149-0760
NSN 6645-01-495-0939
NSN 6320-01-350-5570
NSN 5945-01-214-0388
NSN 6685-01-407-3282
NSN 5920-01-462-0055
NSN 5905-01-198-0092
NSN 5990-00-898-2675
NSN 6105-00-124-8843
NSN 5999-01-093-0963
NSN 5835-01-558-9444