spark plug
feature
1.multi-ribs of insulator eliminate flashove
2.insulator made of 95% pure  alumina, strong resistant to heat shock, great mechnical and electric features,super insulation
3.nicket plated housing prevents oxidation and corrosion,heat crimping process ensures absolute gas tight fit
4.inner sealing with conductivity glass ensures a fine conductivity and sealing
5.multi layer gasket are elasticly strong ,and reliable in sealing
6.copper core electrode prevents oxidation and corrosion good electric and heat conductivity,long spark plug service life.