Product Details: The Berryman B-12 Chemtool Carburetor Choke and Throttle Body Cleaner is the perfect solution for quickly dissolving gum, varnish and other fuel residues that can build up in your engine. This powerful cleaner disperses moisture in conventional gasoline and helps keep injectors, carburetors, intake ports and valves clean. It is also harmless to oxygen sensors and catalytic converters, making it a safe and effective choice for your engine maintenance needs. With its 16-ounce size, you can easily keep your engine running smoothly and efficiently. FleetPride is your First Click in Heavy Duty®.