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spark plug we can offer you all kinds of motorcycle spark poug (spark plug,motor parts),OEM is welcome. This parts is made with 95# high-alumina porcelain wihich is reliable to isnsulation and resistance to thermal shock. The surface of the crust is plated with nickel which is oxindation resisting and erosion resisitin. To hear the rims by electricity can make the sealing property more reliable. The inner part is sealed with conductor silver powder glass sealant which makes its electrical condustivity, heat dispersing and sealing better, The central electrode is nickel alloyed which has advantages is good heat and electrical condustivirty. The part is characterized by strong resistance to heat, oxidation, and erosion as well as characterized by long plut spark life certification : QS-9000 : 1998 ISO9001 : 20001) National standard quality guarantee long lasting workinglife time.2) competitive price3) positive customer feedback from oversea and domestic market4) sample purpose order is acceped