The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6610-00-081-2365
NSN 5905-01-441-1153
NSN 5930-01-356-8919
NSN 6620-01-633-8443
NSN 6135-01-651-7287
NSN 5855-01-648-2674
NSN 5930-00-466-3643
NSN 5996-01-327-8782
NSN 5975-00-265-7776
NSN 6145-01-410-8322
NSN 5915-01-644-8760
NSN 7035-00-481-5182