The Bardahl Gear Oil Additive and Stop Leak is an 8 ounce auto accessory designed to extend the life of gear oil. With its multi-color packaging and theme of gas and oil, this product is perfect for collectors or anyone looking to keep their vehicle running smoothly. Bardahl is a trusted brand known for producing high-quality automotive products, making this gear oil additive a reliable choice for those looking to maintain their vehicle's performance. Plus, with free express shipping in the United States, it's convenient and efficient to use.