The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5920-01-401-5315
NSN 6150-00-446-3317
NSN 5999-01-650-5383
NSN 6650-00-882-1011
NSN 5950-01-297-5958
NSN 4140-00-287-3175
NSN 5910-01-129-0059
NSN 5999-01-400-2606
NSN 7035-01-055-6806
NSN 5930-00-988-7544
NSN 6645-00-200-2324
NSN 5990-01-180-7365