The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6685-01-281-7267
NSN 6130-01-501-4463
NSN 5975-01-606-9924
NSN 5920-01-317-3506
NSN 4140-01-629-3972
NSN 5930-00-065-2118
NSN 5975-01-018-9006
NSN 6610-01-330-4903
NSN 5895-01-608-9258
NSN 5998-00-586-3068
NSN 5985-01-486-9539
NSN 5920-01-437-8550