The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6620-01-386-5543
NSN 6135-00-452-2266
NSN 5910-00-584-4614
NSN 5990-01-555-6616
NSN 6105-01-024-9425
NSN 6150-00-035-4573
NSN 5998-00-604-8446
NSN 6240-01-063-7685
NSN 6240-00-674-8344
NSN 5920-00-556-9993
NSN 5905-00-933-3352
NSN 4140-01-202-8670