Mag 1, 11 OZ, Carb & Choke Spray, Premium Non-Chlorinated Formulation Quickly Cleans The Carburetor, Dissolves & Removes Harmful Carbon, Gum, Sludge & Varnish Deposits From Manifold Heat Control Valves, Pac Valves, Automatic Chokes, Carburetors, Combustion Chamber, Linkage & Distributor Shaft, Improves Fuel Efficiency & Performance.