The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5895-01-386-3049
NSN 6610-01-509-8469
NSN 5910-01-391-3459
NSN 6135-01-359-4293
NSN 6150-01-518-3826
NSN 5910-01-025-9987
NSN 6110-01-510-4197
NSN 5999-00-468-7992
NSN 4140-00-159-8471
NSN 6145-00-964-5194
NSN 5999-01-218-5740
NSN 2925-01-595-9720