The primary inclosure containing a drying agent such as silica gel or activated alumina.
NSN 6240-01-175-3877
NSN 6240-01-167-2774
NSN 5915-01-167-9072
NSN 5905-01-614-5269
NSN 6645-01-535-7136
NSN 5855-01-526-2012
NSN 5930-01-634-0659
NSN 6620-01-340-1503
NSN 5999-00-518-1007
NSN 6645-00-565-1569
NSN 7035-00-104-7613
NSN 6130-01-398-4010