The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6135-00-973-5632
NSN 5920-01-641-1305
NSN 5996-01-611-2206
NSN 5835-00-092-1136
NSN 6685-01-398-5906
NSN 6150-00-383-3443
NSN 5960-00-355-7307
NSN 5985-00-721-4303
NSN 6620-01-591-1761
NSN 6610-00-264-0961
NSN 6130-00-662-8557
NSN 6620-01-476-7355