The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5975-01-551-1172
NSN 6150-01-627-6719
NSN 5975-00-099-9312
NSN 5950-01-106-5325
NSN 7035-01-113-6492
NSN 6220-01-279-1331
NSN 6240-00-138-3082
NSN 5998-01-329-8828
NSN 7035-01-387-8655
NSN 5915-01-022-7237
NSN 5910-01-367-6155
NSN 6610-00-751-7916