The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5975-00-897-9959
NSN 5925-00-403-4061
NSN 6220-01-525-0373
NSN 6645-01-245-8390
NSN 6135-00-248-4102
NSN 5920-01-512-0713
NSN 6645-01-400-2119
NSN 5925-00-422-3737
NSN 5915-00-564-2490
NSN 5999-01-281-3180
NSN 5855-01-447-3137
NSN 2925-01-097-0903