Here is an example of another forestry application. A glass insulator is mounted to a tree on a standard sidepin. Wire from that then goes to a porcelain donut, which then holds the wire. On the line where this was found, some of the wires were directly connected to the glass insulators, but most were used like this. One tree was far enough off the line that the distance between the glass insulator/tree and the donut was about 12 feet!