This is a 14mm PZ14 hand choke carburettor suitable for Pitbikes and Quad Bikes / ATV's Motorcycles. The choke lever is positioned on the left when the manifold faces backwards upon mounting. Key specifications include an outer diameter of the air filter connection point (excluding lip) of 28 mm / 1.1 inches and internal dimensions/diameter of the fuel chamber of 14 mm / 0.55 inches.