R5gl12-77 with Certification Approved Match for Gl3-1, Gl3-3, Gl3-5

R5gl12-77 with Certification Approved Match for Gl3-1, Gl3-3, Gl3-5. OE Market Leader: No.1 OE spark plug manufacturer in China covering 60% of the market. Advanced Electrode Tech: Features Double J Gap Iridinum Electrode for superior performance. High Fuel Efficiency: Open torch design ensures complete combustion and maximizes power. Eco-Friendly Design: Reduces carbon monoxide and harmful hydrocarbons in exhaust. Massive Production Scale: 42 fully automatic lines with 300 million annual output capacity. Comprehensive Certifications: Holds ISO9001, IATF16949, ISO14001, and FD Q1 certifications. OEM & ODM Services: Full OEM and ODM support available including production line setup. Long History Experience: Founded in 1961 with over 60 years of R&D and production experience.