The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5895-01-522-3642
NSN 6135-01-255-9129
NSN 4140-01-075-0419
NSN 5975-01-005-3734
NSN 5835-01-256-3166
NSN 5915-01-287-2328
NSN 6220-00-271-4639
NSN 5920-01-648-7653
NSN 4140-01-170-2618
NSN 6610-00-958-0294
NSN 6685-00-682-0907
NSN 7035-00-553-6951