The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6240-01-104-4494
NSN 5990-00-631-1617
NSN 6685-01-336-4355
NSN 6650-00-401-1496
NSN 6130-00-103-7082
NSN 6135-01-584-0941
NSN 5855-01-458-8137
NSN 5999-00-010-1768
NSN 5965-00-201-1167
NSN 6150-01-049-2354
NSN 6110-01-257-4563
NSN 5975-01-179-4950