... certifications. spark plug ( ignition plug , pulse igniter , ignition electrode ) material of choice:1)Ceramic Insulator Body: 95% Alumina, ... Steatite with glazed or no glazed layer .2) Electrode Pin/Rod: OCr25Al5, SUS304, Ni80Cr20, KanthalA1, etc.3) Cable ... UL1332, UL1911, UL3573, UL3071, UL3239 etc.4)spring: Steel-Nickel Plated, Steel-ZINC Plated, Steel- Copper Plated etc.5) Terminals ...