... supply the double ground electrode ,tri-ground electrode ,quadrifid electrode spark plug.2.Materials:copper core electrode ,platinum electrode, iridium alloy ... electrode ix spark plug 3.Replaced for below motorcycle COMPANY SPECIFICATIONNGK SPECIFICATIONC7TC7HSAC7TEC7EC8TEC8ED8TD8EABP7TBP7HSB8TEB8ESB7TEB7ESGM6ABM6AGM7ABM7AGPM7ABPM7A 4 ...