Here are a stereo wiring cable I bought a while ago and four endpin jacks. I bought the stereo wiring cable online and applied copper foil to a piezo pickup, inserting wire for grounding, and then left it as is. The piezo pickup produces sound. Of the four endpin jacks, three are 4-pin, one is unused, and two have been used. One has the tip of the jack cut off. Please consider this as junk, as none of the four endpin tail screws are present. Type...Electric Acoustic Guitar Accessories/Parts...Pickup