The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5990-01-605-4769
NSN 5910-01-163-3968
NSN 5925-01-261-9537
NSN 6620-00-656-5799
NSN 5935-01-363-4956
NSN 6110-00-731-9754
NSN 6240-01-168-6185
NSN 6130-01-187-0211
NSN 5930-01-617-7623
NSN 6145-00-897-3112
NSN 5895-01-428-4007
NSN 6620-00-947-3889