Quality soviet subminiature double triode 6N16B-I (6H16Б-И) is a variant of the 6N16B tube, which was designed for work in pulse mode. 6N16B-I is directly replaceable with all the 6N16B family members. New old stock tubes, directly from the factory packing. Years of production: 1968 and 1970. Manufacturer: Melz (Moscow).