Driven Racing Oil Carb Defender Fuel Additive (1 Bottle). Designed for carbureted classic and performance vehicles, this concentrated additive prevents costly repairs and poor performance resulting from the use of corrosive ethanol-blended pump gas or flex fuels. Includes One 4.5oz Bottle. Driven Part #70040.
Full Manufacturer's description under the picture below.
Product Representation: Actual parts may vary based on configuration ordered.