Composite Polymer Suspension Insulators are also known as" Composite Long Rod Insulator".The Term" Long rod" is actually used for a specific design of porcelain insulator which was first introduced in Germany as an alternative to "cap and pin insulator",and also for critical ambient conditions such as high pollution.The Construction of a Composite Suspension Insulator is shown as below pictures.The Fiber reinforced core,the metal fittings and the silicon housing shed.