The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5930-01-446-1543
NSN 5999-00-459-1211
NSN 2925-01-506-3218
NSN 4140-01-147-4764
NSN 7035-01-344-8708
NSN 6610-00-999-1528
NSN 6150-01-029-2146
NSN 5920-01-230-9572
NSN 5935-01-539-0641
NSN 5910-00-463-3525
NSN 5975-01-446-9449
NSN 5990-01-561-0737