This brass rod (sometimes called a spacer or even "stuffing ball" in Weber literature) helps to control the flow of fuel from the accelerator pump to the accelerator pump jet in the Weber DCOE carburetor. It is designed to hold the Valve Ball (check ball) down in the closed position until the accelerator pump piston forces it up, opening the valve. Sold individually; 2 required per carburetor.
Note: Fits genuine Weber (made in Italy or made in Spain) carburetors only! Does not fit most copies, Asian knock-offs, or work-alikes.