This guy insulator from Powerline Hardware is expertly designed to provide reliable support and stability in aerial wire installations. Measuring 5-1/2 inches by 3-3/8 inches, it features a 5/8-inch hole that facilitates secure fastening to various pole structures. Compliant with ANSI 54-3 standards, it is a vital component for enhancing the performance and longevity of aerial line systems, making it an essential addition for anyone working with aerial hardware and poles.