The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6610-01-226-6593
NSN 5855-01-312-5160
NSN 6145-00-840-5290
NSN 2925-01-514-9358
NSN 5965-01-521-9229
NSN 4140-01-159-5135
NSN 6320-00-456-0836
NSN 6645-01-493-8632
NSN 5985-01-178-4406
NSN 5835-00-358-4235
NSN 5965-01-032-9146
NSN 2925-00-891-9289