The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 5990-00-066-2217
NSN 7035-00-104-7613
NSN 5945-01-577-6414
NSN 5925-01-366-3568
NSN 5945-01-462-5903
NSN 5999-01-005-1387
NSN 5895-01-475-2339
NSN 5855-01-108-9106
NSN 6135-01-528-6896
NSN 5998-01-174-9189
NSN 5915-01-138-2233
NSN 5925-01-550-2251