This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Johnny ball strain insulator. strain insulator sometimes called Johnny ball These are used in guy cables supporting utility poles to prevent any high voltage on the cable due to leakage currents or an electrical fault on the pole from reaching the lower part of the cable which is accessible by the public They are also used in guys