The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 7035-01-612-3620
NSN 6145-01-364-0346
NSN 6610-01-346-2802
NSN 6650-00-213-7065
NSN 5985-01-517-9935
NSN 6220-00-856-3583
NSN 5930-00-725-6919
NSN 5920-01-048-6907
NSN 5975-00-073-5593
NSN 7035-00-252-7467
NSN 5925-01-114-3429
NSN 6650-01-462-0830