Guitar pickups. These were originally installed in the Zemaitis guitars, and I believe they are not sold separately, so they are rare. I bought them on a flea market site to try them out, but I haven't had time to use them lately, so I'm selling them. Set includes neck and bridge pickups. Neck = 8.73kΩ Bridge = 16.65kΩ They should look nice if you polish them with a cleaner.