The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6240-00-113-8820
NSN 6130-01-189-1406
NSN 6150-00-258-3761
NSN 6130-00-413-4683
NSN 5895-01-178-3831
NSN 6145-01-563-3105
NSN 5990-01-095-8866
NSN 6105-01-470-9693
NSN 6110-00-553-8816
NSN 6620-01-651-5425
NSN 5985-00-512-2724
NSN 6610-00-093-4178