The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6320-00-160-0899
NSN 5990-01-425-2175
NSN 6620-00-216-6416
NSN 5999-01-231-1997
NSN 6135-01-633-8502
NSN 5960-00-503-4880
NSN 5855-00-160-2286
NSN 4140-01-604-9981
NSN 5930-01-461-1974
NSN 6130-01-013-9343
NSN 5925-01-361-8836
NSN 5895-01-357-0835