Zareba ICY-Z Corner Post Insulator, Yelllow, 10 per Bag Fastens electrified wire to round or square post fence without losing energy through the post Formed of thick, tough plastic Can withstand the strain of wire at corner of electrified fence For 9-22 gauge high-tensile steel wire and aluminum wire, all polywire (regular and heavy duty), and polyrope up to 1/4-inch in diameter 10 insulators per bag