The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6620-00-280-2874
NSN 6610-01-250-2811
NSN 5965-01-452-8406
NSN 5930-00-839-6081
NSN 5950-01-070-9894
NSN 5895-00-003-0433
NSN 6150-01-642-1990
NSN 5996-01-503-3410
NSN 5950-01-420-8913
NSN 5990-00-102-9600
NSN 5960-00-973-0700
NSN 6220-01-165-8871