The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6240-01-473-7989
NSN 6135-00-170-8819
NSN 6105-01-384-3687
NSN 5935-01-145-5906
NSN 5950-00-520-2292
NSN 6130-01-462-2425
NSN 5855-01-571-6715
NSN 5930-01-571-5778
NSN 6110-01-241-1381
NSN 5985-00-519-8382
NSN 5935-01-189-0869
NSN 5915-01-487-7703