The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5990-01-094-6826
NSN 6145-00-596-2606
NSN 5996-01-280-9922
NSN 6150-01-411-5216
NSN 5999-00-812-3349
NSN 5990-01-108-0436
NSN 6110-00-460-7179
NSN 6620-01-445-4295
NSN 6610-01-554-7451
NSN 5895-01-543-2383
NSN 5990-01-143-2518
NSN 6645-01-055-5465