The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6110-00-104-7401
NSN 5895-00-790-1813
NSN 5915-00-869-4868
NSN 5998-01-408-4676
NSN 5945-00-753-5127
NSN 5920-01-050-5565
NSN 5999-00-034-3939
NSN 6645-00-089-8842
NSN 6320-00-284-1524
NSN 5930-01-200-9627
NSN 6220-01-632-0405
NSN 5835-00-930-8500