The new Filter king has been specially designed to provide a constant and steady flow of fuel under all driving conditions by means of a large and reactive membrane and the following claims are made. 7.9MM (5/16") FEED PIPES ONLYprevents fuel bubbles-reduces the formation of carbon residues-diminishes the danger of fire in the car-improves performance of the engine-enables fuel savings of 5-10%-gives regular and constant idling--makes easier driving in long queus-prevents overflowing of carbs-filters with higher filter capacity.