Pin Type Insulator is applied to high voltage power line service. And have features of good gydrophobicity, anti-ageing, anti-leakage trace and electric erode proof, tensile strength and bending strength, strong mechanical strength, shock resistance good quakeproof and brittle failure proof, light weight, easy to installation, and the installation iutline of top and base are the same size with porcelainpin type, they can exchange to use each other.