Protect your fences with ease using the American Farm Works Polytape Wood Post Insulators for All Polytape Widths Up to 2 in. The UV-stabilized polyethylene construction prevents the electrical current from moving through the fence insulator to damage the post. These post insulators also extend the wire from the post, and they feature large flanges to prevent arcing. With their simple-to-install design, American Farm Works electric fence post insulators help make maintaining your perimeter easy. Each pack comes with 25 post insulators.