The NL-5859C is a clear glass numeric nixie tube manufactured by National Electronics. Its very similar to the NL-950S, and was also manufactured by burroughs. It was designed to operate in mutliplex operation. The body of the dube is very small to make it suitable in space critical projects. The wires of the tubes are pre-cut to use the tube with a socket. There is also the NL-5859 with full length wires