One good used 4 pin plug AMPHENONL 91- MC4M These are getting hard to find! Chrome plated, connectors may have some normal signs of use, but overall very nice and not worn down nor worn out. May have a bit of wire in it you can unsolder Fits old EV and Shure 4 pin mics. These have the key offset from pin 1 and fit most anything except some Motorola which had the key in line with pin 1. (ask if needed) Picts are samples, yours may have the larger 11mm or smaller 8mm diameter spring, if it matters ASK first.