The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5990-01-126-5824
NSN 6610-01-415-1623
NSN 5996-01-447-1418
NSN 5925-01-086-6008
NSN 5996-01-437-7234
NSN 5965-01-175-2564
NSN 6110-01-179-0237
NSN 5920-00-246-5992
NSN 5835-00-192-9568
NSN 5950-01-545-8820
NSN 5935-01-130-2598
NSN 5998-01-029-5561