The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6645-00-102-0015
NSN 5950-01-626-5146
NSN 5996-01-298-6012
NSN 6110-01-363-4023
NSN 5990-01-437-4876
NSN 2925-01-448-2880
NSN 4140-01-018-2984
NSN 6645-01-485-6536
NSN 5998-01-135-3166
NSN 2925-00-149-0760
NSN 5925-01-543-8310
NSN 6320-01-445-5893