You are bidding on High Voltage Wire Belden 8866 #18 20 Feet 40 KV wire.
This wire was in a bundle of 7 that fed a UHF transmitter.
Each transmitter, they were Klystron tubes, ran around 26 KV.
Each cable will be labeled 1 thru 7 So the number on the cable you receive may be 1-7. The raw Belden #8866 wire was bundled by a separate company who made the harness at a different factory.
Check out the photos
Thank you
PaulC
W1VLF on Youtube