The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 2925-01-415-2140
NSN 5920-00-736-7882
NSN 6135-00-998-5884
NSN 5925-01-605-3888
NSN 6130-01-143-3611
NSN 6110-01-170-1298
NSN 6110-01-468-0428
NSN 5935-00-879-5119
NSN 5920-01-426-8517
NSN 5910-00-980-3946
NSN 5950-01-464-9962
NSN 6150-01-082-6246