The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 4140-01-374-3689
NSN 4140-01-512-9399
NSN 6150-01-550-3741
NSN 5920-01-319-6790
NSN 6320-01-291-4870
NSN 7035-00-312-3055
NSN 5855-00-997-6225
NSN 6220-01-443-9315
NSN 6220-00-832-0999
NSN 5998-01-086-5320
NSN 5905-00-172-3490
NSN 5998-00-617-0354