The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5835-00-139-6407
NSN 5915-01-398-6277
NSN 6110-01-578-0920
NSN 6130-01-306-2536
NSN 5855-00-125-0780
NSN 6135-01-420-0341
NSN 5975-01-573-7195
NSN 5950-01-050-7742
NSN 6320-00-098-2858
NSN 5965-00-554-4138
NSN 5915-01-406-4637
NSN 5925-01-474-5931