The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6610-00-782-0761
NSN 5935-01-388-1418
NSN 5996-01-256-2073
NSN 6610-01-623-9267
NSN 5998-00-400-2985
NSN 5975-01-605-0860
NSN 5905-00-532-1411
NSN 6150-00-415-4808
NSN 6650-00-513-9713
NSN 5920-01-190-9441
NSN 6135-01-503-1688
NSN 6650-00-296-4670