The Dare Pinlock Insulator for T-Posts is designed to fit 1.25 and 1.33 lb/ft T-posts, with heavy cross sections built to withstand the pressure of high-tensile fencing. Its large flange prevents shorts and arcing, while the high-density polyethylene construction with carbon black provides superior UV resistance and reliable performance in any climate. Durable and versatile, this black insulator is ideal for secure, long-lasting high-tensile electric fencing.