"This insulator is a long distance design. It has a long leakage path with straight, smooth sides on the inner surface of the petticoat; thus water dries quickly from its surfaces. The groove is square, with a flat shelf to support the line wire. The lower side of the groove is strengthened to support a very heavy sleet load."
Smooth base Made from 1938 - 1950's
please text 919-274-2013