The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5925-01-606-3923
NSN 5855-01-605-2438
NSN 5999-01-304-7152
NSN 6135-01-046-6803
NSN 5920-00-331-0583
NSN 5975-01-354-7914
NSN 7035-01-238-9301
NSN 5930-01-511-2144
NSN 5965-00-096-7370
NSN 6610-00-186-9180
NSN 5925-00-797-0860
NSN 5950-00-083-3015