1.Muti-ribs of insulator eliminting flashover 2.Insulator made of 95% pure alumina strong resistant to heat shock, with great mechanic and electric features,Super insulation 3.Nickel plated house prevent oxidation and corrosion,heat crimping process ensures good sealing performance. 4.Inner sealing with conductive glass ensures a fine conductivity and sealing pfeformance. 5.Multi-layer gaskets are elasticly strong and reliable in sealing 6.Copper core electrode prevent oxidation and corrosion,and ensures good electric and heat conductivity,long sevice life. We can provide for any car if you can provide us the part number or samples.