The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5975-01-621-7379
NSN 5990-01-551-4356
NSN 6150-01-562-4362
NSN 6130-00-432-8775
NSN 5920-00-421-0991
NSN 6240-00-902-8551
NSN 6610-01-512-2025
NSN 5835-01-250-2939
NSN 5925-01-386-3178
NSN 5990-01-434-3469
NSN 5920-01-204-6419
NSN 6145-01-097-9717