The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 7035-00-052-2188
NSN 5905-01-072-3834
NSN 5998-01-565-1200
NSN 5925-01-407-5954
NSN 6110-01-145-3261
NSN 5999-01-007-2415
NSN 6650-00-251-7512
NSN 5895-01-279-6589
NSN 5835-00-876-4544
NSN 5996-01-153-2359
NSN 5895-01-025-9295
NSN 5990-00-421-5135