This is a standard nozzle with a 3mm (0.120") orifice, used on a Mazak Mark II, NTX, STX, and all early Mazak Models. This is the Wide version of the nozzle.
Longer lasting, harder versions of this nozzle are available -
Chrome Plated version available here
Chrome Plated / Double version available here
Mazak® Part # 46603350530