CHINA RUIAN RIYI VEHICLE PARTS CO.,LTD. is specialized in producing and researching all kind of Mass Air Flow Sensor and Crankshaft Position Sensor。we are the first manufacturer in China .Our range of Mass Air-flow Sensor is the most comprehensive and available in China .We have more than 300 items at present and have Crankshaft Position Sensor 70 items .we still developing many new parts. We have been exported to europe and American market more than 7 years ,manily on Germany,Italy,France,America ,England,there are more than 50 countries and areas and well received by the customers. Based on our plentiful experience, high work capabilities, good industry reputation , we have established long and lasting business relations with buyers from all over the world,we are confident that we will be one of your best air flow meter suppliers in China .