The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5999-01-207-3099
NSN 6320-01-426-8947
NSN 6620-01-597-0512
NSN 5945-01-620-7703
NSN 6220-01-017-2734
NSN 6620-01-384-2105
NSN 5950-00-818-9333
NSN 6620-01-559-1921
NSN 4140-01-391-6462
NSN 5915-00-974-9337
NSN 4140-01-026-9293
NSN 5990-00-594-3395