The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6320-01-578-6006
NSN 6135-00-134-6648
NSN 6145-00-921-7990
NSN 6220-00-919-8172
NSN 5950-01-356-7457
NSN 5925-01-542-4620
NSN 4140-00-643-3744
NSN 5835-00-269-2232
NSN 2925-01-510-2221
NSN 6685-00-011-1998
NSN 6145-01-197-9233
NSN 6240-00-695-1032