Barn find, with scuffs, no leaks so view all pics for more details. thank you The Vintage Petrolon's Slick 50 Manual Transmission Treatment is a 1 quart container of a manual transmission treatment made by the brand Petrolon's. Slick 50 is a commonly used product in the automotive industry, particularly for manual transmissions. The product is manufactured in the United States, ensuring quality control and authenticity. This treatment is designed to help improve the performance and longevity of manual transmissions, making it a valuable addition for car enthusiasts and mechanics looking to keep their vehicles running smoothly.