Zareba IWKNY-Z Wood Post Knob Insulator 9 to 22 ga Fence Wire Aluminum/Polywire/Steel Polyethylene Yellow

For fastening electrified wire to wood posts without losing energy through the post. Economical insulator with double headed nail. For 9 to 22 ga high-tensile steel wire and aluminum, all polywire (both regular and heavy-duty) and polyrope of diameter up to 1/4 in. Yellow color. 25/Bag.