Spark plug suitable for autmobile of various types. We can also produce by your samples. If you are willing to co-opperate with us,get in touch with us please. Technology parameter is the following: 1)Multi-ribs of insulator eliminate fiashover. 2)Insulator made of 95% pure alumina strong resisant to heat shock,great mechanic and electric featires,supper insulation. 3)Nickel plated housing prevents oxidatioin and corrosionmheat crimping process ensures adsolutegastight fit. 4)inner sealing with coductive glass ensures a fine conductivity and sealing. 5)Multi-layer gaskets are elasticy strong,and reliable in sealing. 6) Copper core electrode prevents oxidation and corrosion,good electric and heat conductivity,long spark plug service life.