... electricity and heat conductivityGuarantee/Warranty Auto iridium type: 60,000-80,000km (99.5% pure iridium )Auto standard type(Cu-Ni): 20,000-40 ... ,000kmMotorcycle iridium type: 30,000-50,000km (99.5 ... % pure iridium )Motorcycle standard type(Cu-Ni): 20,000-30,000km International Approvals: ISO/TS16949; ...