Here is a picture of the Twin Leak insulator U shaped bracket I found on the internet. There were two of these in a kit. They provided a moister break to prevent leakage on the aerial line. It would be neat to see a picture of these in use. The kits are hard to find. Most of the time you see them off of the U bracket like mine. It makes me think that the cement they used to secure the insulators to the bar was not that good. Either way they are neat little insulators.