The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5990-01-147-5225
NSN 6130-01-110-5250
NSN 4140-01-253-5756
NSN 5835-00-941-4959
NSN 6620-00-006-6418
NSN 6150-00-394-4934
NSN 5998-01-474-9018
NSN 6320-01-519-8767
NSN 6610-01-373-8066
NSN 5905-00-476-8633
NSN 6105-00-187-0094
NSN 6620-01-384-2105