A. Unique spiral covered terminal . The terminal is based on hi- tech compu- terized design with top quality material , specially against the environment of the regionsof high temperature and high humidity and electrolytic corrosion. B. High purity zirconium reinforced porcelain body of extra toughness . Under any riding status, it can bear the total thermal volume of combustion in engine and high thermal resistance. C. Triple high grade golden surface treatment . The steel body undergoes triple surface treatment . The thread can make load and unload easier . The world unique CP plating technology provides the best anti- rust and anti- corrosion superior to any brand. D. The unique copper core central electrode features widest thermal range and top electrode quality which can reinforce engine power and acceleration. E. Heat value. Through test at waste gas laboratory and several hundred engines all over