The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5835-00-454-7239
NSN 5925-00-788-0368
NSN 6620-01-585-3982
NSN 5950-00-069-0660
NSN 6135-01-461-2915
NSN 6650-00-629-8027
NSN 5915-01-223-9801
NSN 6620-01-540-1524
NSN 5985-00-526-3469
NSN 5960-01-567-1096
NSN 6620-00-484-4662
NSN 5925-01-406-8605