The 458 is designed for use in areas where electrical storms are highly prevalent. An exposed lightning spike at the top of the antenna is directly connected to the support pipe via a 7/8 inch (22 mm) O.D. high conductivity copper conductor. The radiating system of this antenna consists of six 1/2 wave elements mounted coaxially. The copper 7/8 in. (22 mm) diameter feed line shunt feeds each center grounded element.