Ruian Double-ring Autoparts Co., Ltd. grew out of the professional automotive and motorcycle oxygen sensors manufacturer. Base on 5 years exporting experience of main product-oxygen sensor, our exporting products have extended all over all kinds of autoparts including carburetors, shock absorbers, engine water pumps, radiators, oil pump, fuel system-gasoline injection, cooling system, suspension series and so on. Our focus is on R&D, ensuring that we provide our customers with top quality ...