1.Insulative,waterproof,restrained oxygen 2.ISO/TS16949,ISO9001:2000,ROHS 3.MOQ; ... the filter, engine, spot counter, wiring harness, etc, PerfermanceInsulative, sealed, waterproof, restrained oxygen,aging and eroderestrained high and low temperature .CertificateISO ... experienced engineers5. Prompt delivery and excellent after serve Exhaust gas cap