820020 Screw-On Rod Post Insulator, 1/2 in Fence Wire, Aluminum Wire, Poliwire, Politape, Polirope, Steel Wire

An important part of your electric fence system, insulators are used to fasten electrified wires to your fence posts. An insulator's job is to allow electricity to continue through the wire without any loss of energy to a post. Made from materials that do not conduct electricity (mainly plastic or porcelain), a good quality, long-life insulator is necessary for the performance, efficiency and longevity of your electric fence.