The Corteco Differential Output Flange Seal - 01020317B is a high-quality seal designed for use in automotive differentials. It is made of durable materials and is specifically designed to fit and seal the output flange of the differential, preventing any leaks or contamination. This seal is essential for maintaining proper lubrication and preventing damage to the differential components. It is a reliable and long-lasting solution for ensuring the smooth operation of your vehicle's differential.