The product core number series for: 9, 15, 21, 25, 31, 37, 51, 65, 69 core total of nine specifications. The use of stranded pins (commonly known as twisted pins) , the pitch is 0.635mm, the external dimensions of the small; plugs and sockets rely on screws and nuts screwing butt, insertion and extraction of soft and reliable locking; suitable for high-density, miniaturization, lightweight, high-reliability requirements for the connection of a variety of electrical circuitry systems to meet the needs of the system of lightweight and miniaturization: products crimped wire cross-section area of 0.035mm2.