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By certification 
Specification:
(1)Multi-ribs of insulator eliminate flashover.
(2)Insulator made of 95% pure alumina,strong resistant to heat shock,great mechanic and electric features,super insulation.
(3)Nickel plated housing prevents oxidation and corrosion,heat crimping process ensures absolute gas-tight fit.
(4)Inner sealing with conductive glass ensures a fine conductivity and sealing.
(5)Multi-layer gasket is elastically strong,and reliable in sealing.
(6)copper core electrode prevents oxidation and corrosion,good electric and heat conductivity,long spark plug service life.
(1)Multi-ribs of insulator eliminate flashover.
(2)Insulator made of 95% pure alumina,strong resistant to heat shock,great mechanic and electric features,super insulation.
(3)Nickel plated housing prevents oxidation and corrosion,heat crimping process ensures absolute gas-tight fit.
(4)Inner sealing with conductive glass ensures a fine conductivity and sealing.
(5)Multi-layer gasket is elastically strong,and reliable in sealing.
(6)copper core electrode prevents oxidation and corrosion,good electric and heat conductivity,long spark plug service life.
