core rod is made of fiber glass which is acid and high temperature  resistance .Patented Double sealing structure is used on metal fittings. The unique gluing connection of line rod insulator with metal fittings keeps FRP rod intact,providing the highest reliability of insulator in respect of its mechanical performance.Voltage grading device could reduce RIV level,which protect sheds and sealing from eletrical erosion.          

750kV/300kN AC Long rod composite insulator (complete)