The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5910-00-242-3732
NSN 6685-01-567-4096
NSN 6130-01-168-5286
NSN 4140-01-502-6259
NSN 7035-00-922-5700
NSN 5999-01-516-3285
NSN 5905-01-426-1185
NSN 5985-00-078-3306
NSN 6610-00-814-8598
NSN 5855-00-532-0025
NSN 5945-00-450-0857
NSN 5920-00-694-0483